The phrase “Havasu Falls” is often referencing the actual waterfall called “Havasu Falls” and it’s also often referencing the area where all 5 of the Havasupai Waterfalls exist on the Havasupai Indian Reservation in the Grand Canyon. Havasu Falls itself, the waterfall, is arguably the most aesthetic of the 5 waterfalls at Havasupai. It is the third and middle waterfall from top to bottom, and provides the best swimming, cascades, shade, places to relax, and general amazing ambiance.
Havasu Falls is approximately 80 feet high, where the turquoise waters of Havasu Creek plunge from the travertine terraces above down to a large, idyllic pool of water below. From the pool below the waterfall, the water cascades down through a series of pools, each one a wonderful little swimming pool.
http://waterfallsofthegrandcanyon.com/havasu-falls/