In January, The Pointe Hilton Resort at Tapatio Cliffs in Phoenix will take the edge off the Arizona heat when it opens its three-and-a-half acre water experience. The $7.5 million project adds a 40-foot waterfall, two free-form pools, a 130-foot enclosed water flume, an open-air restaurant pavilion, and poolside gardens. New sun decks and terraces-a total of 65,000 square feet-can be used for functions.