4. Sani Pass, South Africa
Constructed: 1950
Risk Factor: Getting stuck in the tough terrain, going over the side of the mountain
The Sani Pass is located in KwaZulu-Natal, South Africa, and it is the road between Underberg and Mokhotlong, Lesotho. The route up this dangerous road starts at 5,066 feet high, and it climbs 4,370 more feet to reach a total altitude of 9,436 feet above the ground. One major risk is taking a tumble off the side of the mountain.
Sani Pass, South Africa @Wikimedia
Far from being a smooth, paved road made by a company like Dycom or Fluor, the Sani Pass is made of gravel, with gradients of up to 1:3. According to South African law, only 4x4s are allowed to traverse the Sani Pass, which has claimed many lives. When traveling on the pass, you can occasionally see the wreckage and remains of vehicles that were unsuccessful at navigating the mountain pass.