The Phoenicians named Gibraltar, Calpe, then the Romans renamed it Mons Calpe, then Tariq ibn Ziad named it Jib-Al-Tariq (mountain of Tariq) when the Spanish captured the rock they changed the Arabic name to make it sound more cristian, hence Gibraltar.
The cave that you speak of is called lower St.Michaels cave. There is a story that it's so deep, they called it the gates of Hades.
The town Calpe took it's name from the original Calpe which is Gibraltar because their seems to be a smaller rock, but it's not the same, the rock of Gib is limestone.
Gibraltar is the north pillar of Hercules and the south is debated, Jebel Musa or Monte Hacho.
We also say that the apes came through the tunnels that connect's the rock to Africa, but that is legend.
The apes most probably came with the Arab's.
As for the tunnels, if you believe that maybe Atlantis couldve existed and couldve been right there in the straights of Gib, then it's kool to think that tunnels could exist, but getting through them, impossible.
edit on 17-7-2011 by Dr Cosma because: (no reason given)





