About Us:- H2Oasis Indoor Waterpark is a 56,000 square foot (5,200 m) Indoor Waterpark located in Anchorage.It opened in 2003 and is the fifth largest indoor waterpark in the United States.Swimming and kayaking lessons, adult water fitness classes and a whirlpool spa, tanning beds, a game room, six water cannons, a 500-foot long master blaster water coaster, a huge wave pool, and a ginormous body slide. Swimming is a lifelong sport. It can improve your health, provide entertainment, confidence, and skills that can improve your life. Here at H2Oasis we understand the value of basic water safety and swimming essentials. Our staff is dedicated to water instruction that will provide the public with an exceptional grasp of the aquatic environment.