Carretera de los Yungas was, probably, the most famous road in the world as well as the most dangerous. This gravel dirt track covers a 69-kilometre (43 mi) stretch between La Paz and Coroico, in the Yungas region of Bolivia.
Cerro Uturuncu is a stratovolcano located in the Potosí Department, Sur Lípez Province, San Pablo de Lípez Municipality of Bolivia. A minor gravel road climbs up to 6.008m (19,711ft) above the sea level. It’s one of the highest roads in the world. The biggest problem is the extremely low oxygen for engine combustion.