The Funival is a 1,200 mm gauge funicular railway in Val-d'Isère, France
The Funival starts above ground in La Daille and after a few hundred meters it enters a tunnel ending at the mountain station on top of the Bellevarde.
The Funival uses two trains, connected by cables, on a single track. Halfway, a short section of dual track allows the trains to pass each other.
Wikipedia https://en.wikipedia.org/wiki/Funival
Address La Daille 73150, France
Coordinates 45°27'32.904" N 6°57'51.232" E