Close to the Blyde Treur confluence, inside the Blyde River Canyon reserve, are the Bourke's Luck Potholes, named after an early prospector, Tom Bourke (despite the implication of good fortune, he didn't find any gold, though he accurately predicted its presence in the area). The holes, hollowed out of the smooth rock and up to 6m deep in some cases, are almost unnaturally cylindrical shaped, dominating these cliffs. Paths and footbridges take visitors to viewing sites overlooking these formations. The Blyde River then plunges headlong into a gigantic gorge. Beyond the potholes the river plunges into one of the most spectacular canyons on the African continent. On both sides the galleries of sandstone cliffs rise between 600m and 800m above the riverbed.