Think your local swimming pool is big? Think again. Some pools around the world are so massive they could fit multiple football fields – or even an entire lake! These aren’t just ordinary pools; they’re man-made wonders boasting crystal-clear waters, luxurious beaches, and even entire ecosystems that mimic nature.
From hidden gems in Romania to record-breaking lagoons in Egypt, these pools redefine what it means to take a dip! Most of them use cutting-edge filtration systems to maintain pristine water quality, and we’ll also learn a bit about these innovative techniques.
So, let’s dive in and explore the biggest pools in the world, ranked from smallest to largest!
Key Takeaways
- The largest pool in the world is CityStars Sharm El Sheikh, Egypt with 96,800 m² with nearly 14 miles of beaches.
- Other giants include San Alfonso del Mar, Chile (80,000 m²) and MahaSamutr, Thailand (72,000 m²).
- Many mega-pools use eco-friendly seawater filtration, UV sterilization, and minimal chemicals to keep water clear.
- Designs range from luxury resort lagoons to public recreation hubs, often offering kayaking, paddleboarding, and more.
- Advanced filtration tech, like that from Oásis Biosistema, can bring crystal-clear, chemical-free water to pools of any size.
10. Peninsula, Romania
Nestled near the city of Baia Mare, this charming freshwater pool feels more like a serene natural pond than a traditional swimming area. Instead of chlorine-heavy water, the Peninsula’s filtration system is nature itself! Water lilies and koi fish play a key role in maintaining a balanced aquatic ecosystem, helping to naturally filter out impurities while keeping the water clear and inviting.
A swim here feels like stepping into a fairytale, surrounded by floating greenery and gentle ripples from the koi gliding beneath the surface.
Pool Size
18,000 m2 (193,750 sq ft).
9. Laguna Las Brisas de Santo Domingo
This stunning saltwater lagoon is Chile’s hidden coastal paradise. Unlike traditional pools, which require large amounts of chlorine to stay clean, Las Brisas uses seawater filtration technology that continuously circulates and purifies ocean water, ensuring a crystal-clear swimming experience. The gentle waves and golden sand make it feel like a mini ocean, but without the strong tides or unpredictable currents. It’s the best of both worlds!
Pool Size
22,000 m2 (240,000 sq ft).
8. The Lagoon at Windsong Ranch
Everything is bigger in Texas, and this man-made tropical lagoon is no exception! The Windsong Ranch Lagoon isn’t just enormous – it’s also a marvel of water filtration technology. The advanced system continuously removes impurities, maintaining that signature turquoise hue that makes it look straight out of a travel brochure.
Residents can kayak, paddleboard, or simply float in this desert oasis, knowing that clean, eco-friendly technology keeps the water as pristine as a Caribbean beach!
Pool Size
23,230 m2 (250,000 sq ft).
7. Freibad Fürstenfeld
Austria’s largest swimming pool is more than just a place to cool off – it’s a recreational wonderland! Complete with slides, sunbathing areas, and multiple pools, Freibad Fürstenfeld is built to handle thousands of visitors daily, all while keeping its water refreshingly clean.
The pool utilizes a combination of mechanical and biological filtration, similar to the sump filtration system used by Oásis Biosistema. This ensures that even with heavy usage, the water remains crystal clear and free of harmful bacteria!
Pool Size
23,000 m2 (250,000 sq ft).
6. Balneario Carlos Xamena
This gigantic public freshwater pool in Argentina has the capacity for a whopping 1,340 people! Beloved by locals who anticipate it’s reopening with the commencement of the warmer months each year, continuous refurbishments in the off-seasons aim for increased sustainability and reduced ecological impact – making this not just a fun summer spot, but also an eco-friendly swimming destination.
Unlike smaller pools that rely on harsh chemicals, Carlos Xamena’s filtration system focuses on natural water movement and sustainable purification techniques.
Pool Size
26,199 m2 (282,000 sq ft).
5. The Lagoon at Epperson
A 7.5-acre man-made tourist attraction in Wesley Chapel, Florida, The Lagoon at Epperson is undeniably impressive in every way! Some of its next-level features include advanced water monitoring and purifying systems, a swim-up bar, climbing wall, an entertainment section complete with a stadium sized LED screen, and a smorgas-board of additional events and activities to participate in (such as mixology classes, bingo nights and silent discos). To maintain its sparkling blue waters, the lagoon uses a cutting-edge filtration system that monitors and adjusts water quality in real time. Think of it as a smart pool that practically cleans itself!
Pool Size
30,540.9 m2 (328,739 sq ft).
4. Chill Cove, Treasure Bay Bintan
Southeast Asia’s largest crystal seawater lagoon, Treasure Bay Bintan’s Chill Cove is Indonesia’s verifiable aquatic wonderland! Covering a jaw dropping 6.3 hectares (that’s the size of 50 olympic swimming pools!), attendees can swim, paddleboard and kayak at this family-friendly paradise. Instead of traditional chlorine treatment, Chill Cove filters its seawater using natural sand filtration and UV sterilization – keeping it crystal clear without harming marine life.
Pool Size
63,000 m2 (680,000 sq ft).
3. MahaSamutr
Hidden within the luxurious and private Mahasamutr Country Club is Thailand’s biggest artificial lagoon, using advanced and sustainable water treatment technology to maintain the pool with minimal chemical usage. Yep, this exclusive lagoon doesn’t just look luxurious – it’s built with state-of-the-art filtration technology that minimizes chemical usage while keeping the water impeccably clear. Members can enjoy an unparalleled aquatic experience – even having the option to windsurf on these beautiful clear waters!
Pool Size
72,000 m2 (780,000 sq ft).
2. San Alfonso del Mar
This 20-acre lagoon holds over 250 million litres of seawater, although as of a few years ago only a small area is accessible for swimming – now, it is typically used for boats and water sports. However, at a shocking length of 1,013 m (3,323 ft), it’s still a worthy addition to our list! To keep its enormous volume of water clean, San Alfonso del Mar employs a continuous flow system that filters ocean water naturally, reducing the need for artificial treatments.
Pool Size
80,000 m2 (860,000 sq ft).
Coming in at number one as the biggest pool in the world, we present the Egyptian marvel of CityStars, Sharm El Sheikh! Spanning 96 acres – yes, 96 – and nearly 14 miles of white sandy beaches, using the same patented technology as Thailand’s MahaSamutr lagoon to maintain water quality at a low environmental impact.
Pool Size
96,800 m2 (1,042,000 sq ft).
Bonus: The Future of Mega Pools & Advanced Filtration
As these giant pools continue to push the limits of engineering and design, filtration technology plays a critical role in keeping their waters pristine. Most large manmade pools do rely on chemicals to stay sparkling, and many natural waters can appear dark and murky. However, innovative and eco-friendly technologies – such those utilised by Oásis Biosistema – combine biological and mechanical filtration to create crystal-clear water without the chemicals!
Techniques such as:
- Gravity-fed sump filtration (using Japanese mats, brushes, and media)
- UV light & ozone treatments (to break down waste and prevent algae growth)
…are revolutionising how pools maintain water clarity, ensuring a clean, eco-friendly swimming experience.
Final Thoughts
Who knew pools could be this massive? Whether you’re floating in a Texas-sized lagoon, swimming laps across a 20-acre abyss, or just trying to find the deep end (spoiler: there isn’t one), these biggest pools in the world take swimming to a whole new level!
And while these record-breaking lagoons are incredible, you don’t need 96 acres of water to have a stunning, clear swimming experience. With advanced filtration technology, pools of any size can achieve pristine, natural-looking water – without harsh chemicals.
So, whether you’re planning a bucket-list trip to one of these mega pools or dreaming of your own crystal-clear backyard oasis, one thing’s for sure: the future of swimming is bigger (and clearer) than ever!
Ready to experience crystal-clear waters in your own space? Discover Oásis Biosistema’s unique approach to eco-friendly pond and pool filtration!
FAQ
What is the biggest pool in the world?
The biggest swimming pool in the world is CityStars Sharm El Sheikh in Egypt, covering an incredible 96 acres!
Does Chile have the world's biggest pool?
Chile is home to San Alfonso del Mar, which was once the world’s largest pool but has since been surpassed by CityStars Sharm El Sheikh in Egypt.
Where is the largest swimming pool in the US?
The largest swimming pool in the U.S. is The Lagoon at Epperson (a 7.5-acre crystal-clear lagoon in Florida).
Which hotel has the biggest pool in the world?
The largest hotel pool belongs to CityStars Sharm El Sheikh, located in Egypt’s luxurious resort complex.
