An urban explorer found himself under busy Argyle Street in tunnels abandoned for decades. Mitch Kelly, 34, discovered the tunnels beneath the city centre streets, which he believes were once used in ...

Fortifying the American home has become big business, selling escape tunnels, secret arsenals — and even flammable moats. Ron Hubbard, the chief executive of Atlas Survival Shelters, runs one of ...

Renovation at a home in Tielt used as a German military headquarters in World War I revealed a secret escape tunnel, officials said. Photo from Flanders Heritage Agency Contractors renovating a ...

Sunny Jim's Sea Cave in the La Jolla neighborhood of San Diego, California, has been an ocean destination for 123 years.