Outdoor water parks have come a long way since 1969, when the first wave pool opened in Tempe, Arizona. Today’s best water parks are constantly upgrading to offer taller, faster and more outrageous slides and rides—as well as features that can entertain the whole family, from little-kid splash areas to mini spas and movie nights.

Here’s where to find this summer’s five splashiest debuts—from new attractions at existing big parks to totally new (or revamped) whole parks: