Wilson's Cave is a large natural limestone cave within the Rock of Gibraltar. It was discovered by the military during World War II during excavation of Magazine Ramp near Green Lane Magazine whilst carrying out extensive tunnelling within the Rock. The miners were developing a structure to absorb a possible blast (known as a blast trap) from an exploding magazine when part of the tunnel caved into the natural cavity. The magazine was served from Doncaster Adit off the Great North Road which supplied vehicular access to the outside.