Texas is blessed with some of the nations most interesting "show" caves and thousands of "wild" caves throughout the state. Because of the varying geographical regions and features of Texas, you could literally tour the entire state by jumping from cave to cave.
Hamilton Pool Nature Preserve (Dripping Springs, 37 miles on Highway 71 west of Austin, Texas) is one of the most beautiful places in the world. A subterranean lake coming to the surface from under the stone arch grotto is complemented with a waterfall.
I WANNA GO! Grand Wailea Canyon Activity Pool Maui, Hawaii 25,700-square-ft wet playground's a destination in itself (guests receive a map upon entry). 9 pools at 6 levels (40 ft to sea level) connected by a river that carries swimmers along at varying speeds, lazy river currents to whitewater rapids. Highlights include 7 slides, grottoes, scuba certification pool,