The "Petite Ceinture" or "PC" (Small Belt) is an abandoned railway line in the city of Paris (France).
The PC circles around Paris, hence the name "Small Belt". It was used for metro-type passenger trains until 1934. Since then, it is completely abandoned, made obsolete by the new underground metro lines, but most of the rails, tunnels and stations still exist. The PC mostly runs in trench or overpasses, with a few tunnel segments.
A classic destination for Parisian graffiti artists and urban explorers! Of course, this is a NO TRESPASSING area, and the Police Ferroviaire (Railway Police) occasionally writes hefty tickets to trespassers.
Check my other photos of railways.