The Tree Haus Resort in New Braunfels, TX is one of America's most unique lodgings. Along with your stay you'll get access to one of the world's best waterparks, the Schlitterbahn Waterpark. It's basically over 70 acres of awesome.
Death-defying rides like the Tornado (shown here) at Six Flags Hurricane Harbor in Arlington, Texas, will soak and thrill you during hot summer days. The park ranked 10th in attendance among U.S. water parks in 2013.