Fortin du Restefond
Fortin du Restefond is an old military building at an elevation of 2.558m (8,392ft) above the sea level, located in the French Alps, within the Mercantour National Park in the department of Alpes-de-Haute-Provence.
The fortress, also known as casernement du Restefond, was built in 1901 and was part of the Maginot defence line. The road to the fortress is called C4 Route de Nice. It’s asphalted but pretty steep, with sections up to 10%. The road was built in 1860 and is closed from October to June.