Havasu Falls: Supai, Arizona
Located on the Havasupai Tribe Reservation, the swimming hole at Havasu Falls is a doozy to get to, but well worth it (just look at the pics!). You’ll need a permit, and the journey involves a 10-mile trek (or a helicopter or mule ride).
O’heo Gulch: Maui, Hawaii
Formed by the Pipiwai Stream, the seven pools of O’heo Gulch are an excellent spot to cool off after a scenic waterfall hike at Haleakala National Park.