Unduavi Tunnel
Tunel de Unduavi is a high mountain tunnel at an elevation of 3.402m (11,161ft) above the sea level, located in La Paz Department, in Bolivia, within the Cordillera Real of the Bolivian Andes.
It’s one of the highest tunnels in the world. The unlit tunnel is 280 m long on the Ruta 3. The road is asphalted. Expect heavy trucks traffic.