Wow this is amazing. I have visited Gibraltar as a tourist and visited the caves but there was not a whisper about these underground tunnels. A well kept secret for sure! Where do the tunnels lead to? Durham was mentioned?
I am fortunate to have visited 'Gib' in 1980 when I was a young ATC cadet. Besides staying on the RAF base, we visited the RN docks, the barracks to the South, and what was described by our Officers, a "gentle walk" to the top of the rock! Later, as a serving member of the RAF, I got to drive up to the radar site to help with it servicing. However, I've never got to see St Michaels cave. Thanks for showing me what I've missed.
