Boathoist Cave is only accessible from the east coast of Gibraltar by boat or from inside the Rock of Gibraltar. During World War II access steps were built from man made tunnels inside the Rock. The steps were intended to be used as an escape route for the Governor of Gibraltar if the Rock was invaded under the Axis powers' planned Operation Felix. From the cave he could have been transported to a waiting submarine. This huge cave contains a beach which can be accessed by boat. This beach has been created by sand and debris blown out through the relatively small entrance.
Stringer, Chris (2000). "Gibraltar and the Neanderthals 1848-1998". In Stringer, Chris; Barton, R.N.E.; Finlayson, Clive. Neanderthals on the Edge: Papers from a Conference Marking the 150th Anniversary of the Forbes' Quarry Discovery, Gibraltar. Oxford: Oxbow Books. ISBN9781842170151.