 It reaches its highest point (over ) where the escarpment forms the Lesotho – KwaZulu-Natal international border.The upliftment of the central plateau over the past 20 million years caused the original escarpment to be moved inland through erosion to its present position, creating the present-day coastal plain.The position of the present escarpment is therefore approximately inland from the original fault lines that formed the walls of the rift valley that developed along the coastline during the break-up of Gondwana.