There are three waterfalls situated in the Grand Canyon of the Yellowstone Nationalpark. They are known Upper Falls (33.2 m), Cristal Falls (39 m) and Lower Falls (94 m).
Ethiopia 1984, Lower Falls of the Yellowstone River.
Guyana 1997, Yellowstone Falls.
The stamp was issued in the series "50th Anniversary of Unesco".
Gambia 2004, Yellowstone Falls.