Ride indoor waves, float a slow lazy river and soak in a traditional Korean jjimjilbang at One Mount in Ilsan. This combined water park and spa offers year-round aquatic fun with practical rules and family-friendly supervision.
More ways to explore the area's outdoor wonders
Steam rises from a tiled jjimjilbang as laughter ripples from an indoor wave pool a floor above. One Mount in Ilsan presses entertainment and recovery into a single building: water slides that fling you into artificial surf, a lazy river that nudges you past bright murals, and quiet sauna rooms where heat firms the skin and steadies the pulse.
Difficulty
easy
Duration
1–7 hours
Fitness Level
Suitable for most fitness levels; minimal exertion required beyond walking and climbing pool stairs.
Wildlife
History
One Mount was developed as part of Ilsan’s modern leisure expansion, pairing commercial entertainment with the region’s recreational lakefront.
Conservation
Facilities control capacity to reduce overcrowding and water use; guests are asked to follow rules on waste and to store valuables responsibly to limit staff interventions.
Reserve your spot on the Ilsan ONEMOUNT Water Park + Jjimjilbang Discount Ticket (내국인 불가) today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Redeem at the indoor kiosk
Exchange the Viator barcode at the indoor-side kiosk on the 1st floor — the smaller printed sheet is your admission ticket.
Wear a swim cap
Swim caps are mandatory for all pool areas; bring your own or buy one on site to avoid delays.
Use the electronic locker system
Store valuables in the electronic lockers and note that rental fees are post-paid; report lost keys immediately to staff.
Mind the capacity rules
Admission is first-come, first-served during peak times and attractions may close if capacity is reached — plan weekdays or early hours.
Swim cap
Required for all swimmers in the water park.
Aqua shoes
Grip and protect feet on wet surfaces and where sneakers are not permitted.
Quick-dry swimwear
Comfortable for long stays and for moving between pools and saunas.
Small dry bag or locker money
Protects phone and wallet before storing valuables in the electronic locker system.