New for Great America in 2007 -- GREAT BARRIER REEF™, a 355,000-gallon wave pool. GREAT BARRIER REEF™ is located in Boomerang Bay, the Australian inspired water park inside Great America. Great America is a 100 acre theme park where you can enjoy the most rides, most water rides and most coasters. Plus, Great America is the only theme park in California to offer a complete water park inside- - free with admission.