The rest stop at the southernmost point of mainland Africa is located in South Africa, specifically at a place called Cap Agulhas. This geographical landmark marks the meeting point of the Atlantic and Indian Oceans. It is a significant point for navigation and holds historical importance, highlighted by the Cape Agulhas Lighthouse, built in the 19th century. Visitors to this area can enjoy scenic views, coastal walks, and there is a small museum that recounts the maritime history associated with this iconic location.