Splish Splash waterpark in Westchester County, New York opened in 1991 with several body slides, tube slides, pools, and a lazy river. It has been owned by Palace Entertainment since 1999. The park now spans 90 acres and includes 19 water slides, a 1,300 foot long lazy river, and a wave pool. New rides added over the years include Alien Invasion in 2006 and Doctor Von Dark's Tunnel of Terror in 2009.