These secretive tunnels were once the site of a Royal Air Force fuel reserve depot.

The exit of the largest prisoner-of-war escape attempt on American soil during World War II.

When World War II came to Canada, Fort Péninsule was part of the first line of defense for Allied shipping convoys.

This secret facility trained seals for the Swedish navy during the Second World War.

Some locals believe the fabled lost gold of General Yamashida is hiding somewhere beneath the city.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

The U.S. military dumped millions dollars worth of goods off a beach in Vanuatu, purely to spite the British and French.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.