Gibraltar is honeycombed with 34 miles (55km) of hidden tunnels constructed over 200 years.
www.bbc.com
This thread reminded me of the finding of a WW2 "stay behind" facility in Gibraltar. The Brits had a number of such groups throughout the UK and in UK controlled areas. Every so often, someone will stumble across one of these. NATO decided to do the same thing during the Cold War.
Gibraltar is honeycombed with 34 miles (55km) of hidden tunnels constructed over 200 years.
www.bbc.com
This thread reminded me of the finding of a WW2 "stay behind" facility in Gibraltar. The Brits had a number of such groups throughout the UK and in UK controlled areas. Every so often, someone will stumble across one of these. NATO decided to do the same thing during the Cold War.