The Blyde River Canyon is a natural feature in South Africa, forming the northern part of the Drakensberg mountain range. It is 26km in length, and on average, 800m in depth. The canyon consists mostly of red sandstone. It is the third largest canyon in the world, after the Grand canyon in the United States, and the Fish River canyon of Namibia. The Blyde River Canyon ends at the "Three Rondavels". From many well-positioned vantage points one has a view of the 33 km long gorge. The Rondavels are three very impressive rock formations that were shaped millions of years ago by erosion. Sometimes called the Three Sisters, their iconic presence is a highlight of the Panorama Route.