The Senussi Cave Railway was a long, narrow gauge railway that was built in 1941 during the Siege of Tobruk at the Senussi Cave near Tobruk, Libya.
The Senussi Cave Railway leads from a military road that was blasted into the mountains on 28 August 1941 above a wadi east of Tobruk harbour to the Senussi Cave.
The Senussi Cave had been reinforced during World War II by Italian troops with a concrete arch. It was captured by British and Australian troops in the summer of 1941 and prepared to be used as a field hospital named "Senussi Hospital" in the cave. However, eventually it was used as a bomb-proof store. Up to 300 t of ammunition and goods could be securely stored there.