Do you love that feeling when you plunge into hot thermal water in the middle of a freezing winter, or, on the flip side, when you hurtle down an adrenaline-pumping slide at top speed in the height of summer? If you’re looking for inspiration and want to discover the biggest aquaparks in Europe, I have to warn you right from the start: pointing your finger at a single, absolutely largest complex is actually pretty much impossible.
It all depends fundamentally on the yardstick you choose for the comparison. While one complex will amaze you with the largest surface area in square metres, another boasts a record number of slides, and yet another lures visitors with the biggest indoor area under one roof. On top of that, many of these water worlds rely on claims made by the operators themselves, so it’s worth taking all those lofty superlatives with a pinch of salt.
That’s why I’ve put together a detailed list of ten giant water worlds, breaking down exactly what makes each one stand out and the real numbers behind them. You’ll find out where to find the best-rated park in the world according to travellers, plus plenty of practical tips on where to head for the best water fun.
TL;DR: the biggest aquaparks in Europe at a glance
- Suntago (Poland) – verifiably the largest indoor water park in Europe, with a capacity of up to 15,000 visitors.
- Therme Erding (Germany) – billed by its operator as the world’s largest thermal complex, with the biggest slide world in Europe.
- Siam Park (Spain) – repeatedly voted the world’s best aquapark, with a Thai theme on the island of Tenerife.
- Tropical Islands (Germany) – the largest tropical hall in Europe, hidden inside a former airship hangar.
- Aquacolors Poreč (Croatia) – the largest water complex by area in all of Croatia, with a huge wave pool.
- Hungarospa Hajdúszoboszló (Hungary) – a gigantic complex billed as the largest in Hungary, with over a million visitors a year.
- Aquaworld Budapest (Hungary) – the largest indoor water park in Central Europe, with its iconic glass dome.
- Napfényfürdő Aquapolis Szeged (Hungary) – home to the Kék Anaconda slide, a whopping 272 metres long.
- Therme Loipersdorf (Austria) – the largest thermal spa in Austria and an enormously popular weekend destination.
- Bükfürdő (Hungary) – a giant spa complex covering 14 hectares with more than thirty pools.
When to visit the biggest aquaparks
If you’re planning to visit one of the giant indoor complexes like Germany’s Tropical Islands or Poland’s Suntago, you can head off at absolutely any time of year. These enormous halls keep a gorgeous tropical air and water temperature all year round, making them an ideal escape from a dreary autumn or a frosty winter, when you just want to feel like you’re on an exotic holiday for a while.
With the outdoor giants aimed primarily at the summer season, the situation naturally changes and you’ll need to plan your trip for the warm months. Croatia’s Aquacolors, for instance, and the outdoor sections of the Hungarian complexes usually open their gates from late May to mid-September, with the biggest crowds rolling in during the school summer holidays, when families from all over Europe flood in.
Whenever you plan a trip to one of these huge complexes, I’d definitely recommend considering a visit on a weekday. Not only will you dodge the biggest crowds at the popular attractions, but you’ll often save a fair bit too, since most modern complexes now use dynamic ticket pricing that’s noticeably more expensive at weekends and on public holidays.
Where to stay near the biggest aquaparks
The very best and biggest water worlds are often so vast that you simply can’t get through them all in a single day, which is why it’s worth considering accommodation right on site. Most of these gigantic complexes offer their own themed hotels or adjoining cabin villages, so you can walk straight from the pool to your room in your dressing gown – an absolutely priceless perk, especially with kids.
If you head to Erding in Bavaria, you can stay at the stunning Hotel Victory, styled like a luxury ocean liner with direct views over the artificial waves. In Poland, visitors often make use of the modern cabins at Suntago Village, from where a free shuttle bus will whisk you to the aquapark itself comfortably and quickly.
With the Hungarian thermal parks it’s even simpler, because the local spa culture is built around connecting hotels with pools. A lovely example is the Hunguest Hotel Szeged, where entry to the Aquapolis experience complex is included in the price of your stay – something you can easily check and book through Booking.com.
10 of the biggest aquaparks in Europe
Let’s take a look together at ten specific water worlds that, thanks to their staggering size, deserve your attention. For each one, I’ll explain in detail exactly what record it holds, what attractions await you there, and roughly how much to budget for an all-day adult ticket.
1. Suntago Park of Poland (Poland)
A short distance from Warsaw, an utterly fascinating complex sprang up a few years ago that is verifiably the largest indoor water park in Europe. Beneath its enormous roof lies an area of around 67,000 square metres, with room for an incredible 15,000 visitors a day, and where the water and air temperature stays around a pleasant 32 degrees Celsius all year round.
The main draw is the Jamango zone, home to more than 30 different slides spread across six floors, with a combined length of over 3.2 kilometres. Beyond the adrenaline slides, you can look forward to a huge wave pool, a lazy river and a beautiful relaxation zone surrounded by hundreds of live palm trees imported directly from Florida, Costa Rica and Malaysia.
The complex sits less than 50 kilometres south-west of Warsaw, so from the UK the easiest option is to fly into Warsaw – LOT, Ryanair and Wizz Air all serve the route from London and other UK airports – and then hire a car or grab a transfer for the short hop out. A full-day ticket for the basic zone costs roughly 130 to 170 Polish złoty (around €30–40) depending on whether you visit on a weekday or at the weekend.
💡 Tip: Given the sheer size and number of attractions, I recommend buying tickets well in advance online, securing your entry even on the busiest days and skipping the queues at the box office.
2. Therme Erding (Germany)
This Bavarian giant near Munich is proudly billed by its own operator as the largest thermal complex in the world, and although that’s their own claim, one look at its 185,000 square metres will leave you in no doubt. The complex offers an incredible 40 pools and 35 saunas, drawing almost two million enthusiastic visitors every year.
For adrenaline lovers there’s Galaxy Erding, comfortably the largest slide world in Europe, packing in 28 different slides with a total length of over 2,800 metres. You’ll even find an attraction called Magic Eye, which measures 360 metres and is often described as the longest tube slide in the world – making it an absolute must for every visitor.
From the UK, the simplest route is to fly into Munich – British Airways, Lufthansa and easyJet all run direct flights from London and several regional airports – and Erding is then around a 30-minute drive from the city. A full-day adult ticket costs roughly €54 on a weekday and €59 at the weekend, and you can stay right on site at the stylish Hotel Victory.
💡 Tip: This complex is definitely not just about the slides, so if you’re after some peace and quiet, don’t miss the enormous sauna world – though bear in mind it’s only accessible without swimwear.
3. Siam Park (Spain, Tenerife)
If you’re after the single most popular water world out there, you’ll need to head to the Canary Islands, because Siam Park has repeatedly been voted the world’s best aquapark on TripAdvisor. The whole sprawling 18.5-hectare complex is beautifully styled around a Thai theme and offers 24 absolutely top-class attractions surrounded by lush, exotic vegetation.
The park’s biggest icon is the breathtaking Tower of Power, a slide with a near-vertical drop from 28 metres that shoots you, in a transparent tube, right through a giant aquarium full of live sharks and rays. There’s also the Wave Palace, said to have the highest artificial waves in the world at up to 3.3 metres, and the Mai Thai River, a lazy river said to be the longest of its kind.
Given its location on Tenerife, you’ll of course have to fly – there are plenty of direct flights from the UK with the likes of Jet2, TUI, easyJet and Ryanair to Tenerife South – so this one calls for pairing the visit with a longer holiday. Adult admission is around €45 a day, and it’s worth mentioning that the park has no hotel of its own, so you’ll need to look for accommodation in the nearby resort of Costa Adeje.
💡 Tip: Tenerife enjoys stable, warm weather all year round, so you can head out here even in the depths of winter and enjoy great outdoor bathing without the summer crowds.
4. Tropical Islands (Germany)
South of Berlin lies a place that’s literally an architectural marvel, because it’s the largest tropical hall in Europe. This giant complex was built inside a former airship-manufacturing hangar boasting an incredible length of 360 metres and a height of 107 metres, making it one of the largest free-standing halls on the entire planet.
The capacity of the whole space is around 8,200 people a day, and roughly 1.2 million visitors come here every year to enjoy a constant temperature of 26 degrees Celsius. Inside, alongside sandy beaches and a huge rainforest, you’ll find a 27-metre-high slide tower that ranks as the tallest in all of Germany.
The complex sits roughly 50 kilometres south of Berlin – easily reached after flying into Berlin, which is served by plenty of direct flights from the UK with easyJet, Ryanair and British Airways. It offers a truly unique chance to stay overnight, with 2,500 beds; you can even sleep in tents pitched right on the sand inside the hall. A basic online adult ticket starts at around €34.90, though prices vary considerably depending on how busy it is.
💡 Tip: If you decide to sleep in the tents inside the tropical hall, pack some light summer pyjamas, as it stays fairly warm and humid even at night.
5. Aquacolors Poreč (Croatia)
On a summer holiday in Istria, you definitely shouldn’t miss this fantastic outdoor complex, which is the largest aquapark by area in all of Croatia. It spreads across more than 100,000 square metres and, on hot summer days, can comfortably accommodate up to 5,000 fun-seeking visitors.
The complex is divided into four large themed zones and offers 13 superb slides, among which the giant Magicone adrenaline funnel stands out with its almost twenty-metre starting tower. For some downtime, the 2,700-square-metre wave pool works a treat, as does the half-kilometre-long lazy river, which the operators claim is the longest in southern Europe.
The park lies just two kilometres south of the popular resort of Poreč. From the UK, the most practical approach is to fly into Pula – Ryanair and Jet2 serve the route from several British airports in summer – with the park then around a 45-minute drive away, or hire a car if you’re touring the Istrian coast. Online admission for an adult is €27.40, children pay €22.40, and the very smallest visitors under 90 centimetres tall get in completely free.
💡 Tip: This is a purely seasonal outdoor affair, so always check the current opening times before you travel – they usually run from late May to mid-September.
6. Hungarospa Hajdúszoboszló (Hungary)
Eastern Hungary hides an absolute treasure for everyone who loves a good swim, one that the operator proudly presents as the largest bathing complex in Europe. Whether or not that claim is precise, the fact remains that this is a gigantic space sprawling across an incredible 30 hectares, drawing over a million enthusiastic visitors every year.
The whole complex is made up of several large sections, with the indoor Aqua-Palace alone covering 15,000 square metres and housing 20 different pools. The outdoor summer beach, known as the strand, adds another 13 to 15 large pools, while the huge slide park can boast fifteen adrenaline slides of every shape and size.
From the UK, the easiest route is to fly into Debrecen – Wizz Air operates seasonal flights from London Luton – with the complex then around a 30-minute drive away; alternatively, fly into Budapest and continue on for roughly two and a half hours. An all-day ticket to the indoor Aqua-Palace section costs around 6,400 to 7,400 Hungarian forint (roughly €17), and you can stay very comfortably at the partner Hunguest Hotel Aqua-Sol.
💡 Tip: The complex is so vast that it’s worth planning your visit over at least two days, so you can try out both the indoor experience pools and the enormous outdoor section with its slides.
7. Aquaworld Budapest (Hungary)
Right on the edge of the Hungarian capital you’ll find another wonderful complex, one that holds the title of largest indoor water park in Central Europe. Its absolute centrepiece and architectural symbol is a huge glass dome with a 72-metre diameter, beneath which sits the main section with capacity for 1,800 swimmers and water-fun lovers.
The area under this stunning glass roof measures 4,200 square metres and holds a respectable 15 pools, with nearly twenty across the whole resort. The fun is delivered by 11 fantastic slides, which together offer over a kilometre of fast-paced rides and are guaranteed to keep the whole family entertained for a very long time.
From the UK, simply fly into Budapest – British Airways, easyJet, Wizz Air and Ryanair all run direct flights from London and several regional airports – with Aquaworld then just a short ride from the city centre. An adult ticket costs roughly 8,500 forint on a weekday and 11,500 forint at the weekend, and the complex is directly connected to the excellent four-star Aquaworld Resort with more than three hundred rooms.
💡 Tip: If you stay at the Aquaworld Resort itself, you can hit the pools first thing in the morning or late in the evening, when most of the day visitors are long gone.
8. Napfényfürdő Aquapolis Szeged (Hungary)
Southern Hungary is home to a year-round aquapark combined with healing thermal waters, drawing visitors from all over Europe with one enormous speciality. That’s the flagship slide named Kék Anaconda, which measures a respectable 272 metres, launches from a thirty-metre tower and is often cited as the longest year-round covered slide in Europe.
In total, this experience complex with its 4,400 square metres of water surface offers 13 different slides, nine of them cleverly tucked away under cover and four in the outdoor section. If you’re an adrenaline fan, you’ll also want to try the park’s second-longest slide, measuring 223 metres and even featuring a special steep kamikaze section for the bravest among you.
The city of Szeged sits right by the border with Serbia. From the UK, the simplest option is to fly into Budapest and continue on for around two and a half to three hours by car, or take the train. A full-day ticket costs roughly 5,700 forint from Monday to Thursday and 9,500 forint from Friday to Sunday (around €15–25), and if you stay at the Hunguest Hotel Szeged, pool access is already included.
💡 Tip: To reach the top of the highest thirty-metre slide tower, you can simply take the lift, so there’s no need to worry about running out of energy after a few rides.
9. Therme Loipersdorf (Austria)
Not far from Vienna, in the federal state of Styria, sits a complex long known as the largest thermal spa in Austria and occasionally mentioned, with some caution, as one of the largest in Europe. For many travellers it’s an absolute classic and a hugely popular weekend destination full of hot, healing water.
The whole complex offers an incredible 35 pools and 20 saunas, with the outdoor bathing area covering a massive 23,000 square metres. There’s thermal water at 36 degrees from four of its own springs, plus a great Fun Park with slides totalling 529 metres and the luxurious Schaffelbad relaxation zone reserved exclusively for adults.
From the UK, the most convenient approach is to fly into Vienna – British Airways, easyJet, Ryanair and Wizz Air all run direct flights from London and regional airports – with Loipersdorf then around a 90-minute drive south of the city. There’s a huge range of accommodation in the area, with the thermal hotels Stoiser and Panoramahof among the most popular, letting you get into the water in just a few minutes.
💡 Tip: If you’re travelling without children and craving absolute peace, it’s well worth paying extra for entry to the Schaffelbad zone, which is enormous, luxurious and off-limits to anyone under sixteen.
10. Bükfürdő (Hungary)
The last giant on our list is the second-largest spa in Hungary, located very close to the Austrian border and often ranked among the very largest spa complexes in all of Europe. While it’s primarily a healing complex, its excellent slide park means the whole family can enjoy perfect water fun here too.
The scale of this place is utterly breathtaking: the complex covers 14 hectares and features an amazing 32 to 34 pools with over 5,000 square metres of water surface. Nearly 900,000 visitors come here each year and, alongside four thermal wells, can enjoy a modern sauna world with ten saunas and a slide park with 7 fast slides.
Bük lies close to the Austrian border, so from the UK the easiest route is to fly into Vienna and continue on for around an hour and a half by car. Adult admission ranges from 6,550 forint on a weekday to 7,650 forint at peak times (roughly €17–20), and for an overnight stay the excellent Danubius Health Spa Resort Bük or the nearby Greenfield Golf & Spa are perfect choices.
💡 Tip: The local thermal water has a very particular composition and a darker colour, so for bathing in the healing pools it’s best not to bring your very best light-coloured swimwear, to avoid any staining.
Where to head next from the giant aquaparks
If you love a splash about and fancy trying some interesting alternatives that are practically on your doorstep, you don’t necessarily have to travel halfway across the continent. I’ve put together plenty of other articles mapping out the most fun water worlds within easy reach.
You could, for example, explore the best aquaparks in the Czech Republic, where you’ll find out everything the local giant Aqualand Moravia has to offer. A huge hit in recent years has been the very modern and affordable Polish aquaparks near the border, and if you’re mainly after hot water and relaxation, be sure to check out the most beautiful thermal spas in Slovakia.
Practical tips
Before you rush off to pack your swimwear, I’d like to sum up a few practical pointers that will definitely help when planning your water holiday. The word “biggest” always needs to be read in the right context, because while Suntago is the largest indoor park and Erding reigns supreme over Europe’s slides, Siam Park is the absolute best-rated and Aquacolors dominates the Croatian coast.
For the most far-flung destinations it definitely pays to combine the whole trip with a longer summer holiday, so visit Aquacolors during a stay in Istria, and for Siam Park you simply have to plan a flight straight to the Canary Islands. Remember, too, that thermal giants differ from purely adrenaline aquaparks, so if you’re mainly after extreme slides and speed, head for Suntago or Szeged rather than the relaxing Loipersdorf in Austria.
Looking for more water-fun tips? Take a look at our big hub of the best aquaparks and thermal spas in Europe, where you’ll find icons across different countries and a selection based on exactly what you’re after.
Frequently asked questions
Which is the largest aquapark in Europe?
It depends on what criteria you choose, as the largest indoor water park is Poland’s Suntago with around 67,000 square meters under the roof. The title for the largest tropical hall belongs to Germany’s Tropical Islands, and if we’re talking about quality, the best-rated complex is Siam Park on the island of Tenerife.
Is Therme Erding really the largest in the world?
The operator itself does indeed present the complex as the largest thermal baths in the world, but this should be taken as their own claim rather than some official independent record. What is absolutely certain, however, is that it offers 40 pools and houses the largest water slide world in Europe with 28 slides totalling over 2,800 metres in length.
What is Siam Park and where is it?
Siam Park is an amazing water park on the Spanish island of Tenerife with beautiful Thai theming, which has been repeatedly voted the world’s best water park by TripAdvisor travelers. You’ll find an almost kilometer-long lazy river and the famous free-fall Tower of Power from a height of 28 meters, and from the Czech Republic you can only get here by plane.
Which is the largest aquapark in the Czech Republic and Slovakia?
In the Czech Republic, the popular Aqualand Moravia holds the top spot, boasting a water area of over 3,000 square metres, 16 pools and 24 slides. Meanwhile, our eastern neighbours in Slovakia are clearly dominated by Tatralandia, which is the largest water fun complex in Central Europe with a full 30 slides.
How many water slides does the largest water park have?
When it comes to numbers, Polish Suntago offers over 30 slides with a total length of more than 3.2 kilometers, German complex Rulantica has 31 and Therme Erding Galaxy exactly 28. In terms of the actual length of a single ride, the giant Magic Eye in Erding leads with 360 meters and the indoor slide Kék Anaconda in Szeged with 272 meters.
Which are the largest in Hungary?
In Hungary, you’ll find several gigantic complexes, among the largest are Hungarospa Hajdúszoboszló with an area of approximately 30 hectares and the Bük thermal baths with 14 hectares and more than 30 pools. Furthermore, you mustn’t miss Aquaworld Budapest, which is the largest indoor aquapark in Central Europe, and the amazing Napfényfürdő complex in Szeged.
Do the largest aquaparks have their own hotel?
Most of these giant complexes offer their own accommodation, for example at Therme Erding (Hotel Victory), at Tropical Islands or at the vast majority of Hungarian complexes. However, a major exception is the famous Siam Park on the island of Tenerife, which doesn’t have its own hotel directly within the complex and you’ll need to arrange accommodation at nearby resorts.
Tips and Tricks for Your Vacation
Don’t Overpay for Flights
Search for flights on Kayak. It’s our favorite search engine because it scans the websites of all airlines and always finds the cheapest connection.
Book Your Accommodation Smartly
The best experiences we’ve had when looking for accommodation (from Alaska to Morocco) are with Booking.com, where hotels, apartments, and entire houses are usually the cheapest and most widely available.
Don’t Forget Travel Insurance
Good travel insurance will protect you against illness, accidents, theft, or flight cancellations. We’ve had a few hospital visits abroad, so we know how important it is to have proper insurance arranged.
Where we insure ourselves: SafetyWing (best for everyone) and TrueTraveller (for extra-long trips).
Why don’t we recommend any Czech insurance company? Because they have too many restrictions. They set limits on the number of days abroad, travel insurance via a credit card often requires you to pay medical expenses only with that card, and they frequently limit the number of returns to the Czech Republic.
Find the Best Experiences
Get Your Guide is a huge online marketplace where you can book guided walks, trips, skip-the-line tickets, tours, and much more. We always find some extra fun there!
