Cape Cod's premier fun park! Slides, bounders, large theme slides, obstacle courses, and sports games. The Inflatable Park (dry park), Challenge Zone and H2O is located at 518 Main Street (Route 28), West Yarmouth. Open seven (7) days a week from June 18th through Labor Day. Admission $25 One Park Pass, $40 Two Park Combo, and $50 Three Park Pass.