A new waterpark is opening in Anaheim ahead of the summer Adventure Lagoon will sit off Miraloma Avenue on a 14-acre property leased from the Orange County Water District, said park owner Dave Wabiszewski. It will include an inner Aqua Park, featuring various giant inflatable items such as a 35-foot-high slide. It will also have a kid’s area with smaller inflatables. It will be the third-largest Aqua Park…