Bourke's Luck Potholes. Potholes and plunge pools of the Treur River, Blyde River Canyon South Africa. Sustained kolks in the Treur River's plunge pools have eroded a number of cylindrical potholes or giant's kettles, which can be viewed from the crags above. It was named after a local prospector, Tom Bourke, who predicted the presence of gold. (V)
