Tunnel de Peter Both is a very challenging tunnel located in Réunion, a French island located in the Indian Ocean, east of Madagascar.
The tunnel is 166.51 m (546.28 ft) long. It was built in 1960. Its height is 3m. The tunnel is very narrow, impassable for 2 cars at the same time. The surface is asphalt. It carries the Route Nationale nº5 road, between Saint-Louis and Cilaos.