Some of these locations are the Yosemite National Park in California and Cumberland Falls State Resort Park in Kentucky, US; Victoria Falls on the border of Zambia and Zimbabwe; and Waimea in Hawaii, US.
Below the 68ft-tall CumberlandFalls, about 110 miles south of Lexington in CumberlandFalls State Park, there are simple places to practice white water rafting -- most of the rapids are Class II or Class III, and the rapids are well spaced out.