H2Oasis Indoor Waterpark, located in Anchorage, Alaska, spans 56,000 square feet and opened in 2003. It was the fifth largest indoor waterpark in the U.S. at its launch. The park features attractions such as The Master Blaster, Open-Flume Orange Slide, Enclosed Green Slide, Pirate Ship Kiddie Pool, Lazy River, Wave Pool, and the Alaskan Hot Tub, offering a unique escape for families from the cold Alaskan weather.