The spectacular vista of the Blyde River Canyon, with its sheer cliffs dropping into a bush-covered valley, is part of the scenically breathtaking Panorama Route, worth doing as a self-drive trip from Nelspruit, or on a bus tour. Other sights on the route include the Three Rondavels, a trio of green-clad peaks set in the canyon and the Bourke's Luck Potholes, huge holes in the mountainside formed by grinding sand. The Blyde River Canyon is the biggest 'green' canyon in the world, and the third largest canyon on earth, smaller only than the USA's Grand Canyon and the Fish River Canyon in Namibia. The river itself also offers some challenging white water rafting.