Situated in Mpumalanga, South Africa , these magnificent cylindrical potholes were formed by through erosion at the confluence of the Blyde and the Treur rivers. The site was named after a prospector, Tom Bourke, who ironically never had any luck on his claim as the gold-bearing reef lay a short distance to the south of the river. Old pieces of mining equipment strewn about the area serve as reminders of the gold rush era of the 1870s. There are various bridges to walk over and admire these naturally sculptured potholes and the gorge downstream. A must see attraction in South africa.