Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

This Cold War–era underground city includes offices for Mao Zedong and Lin Biao.

Part of a secret 1970s nuclear defense program is now open to the public.

This disused Cold War bunker has been restored to all of its early 60s glory.

The only remaining Cold War–era Minuteman II missile control center in Missouri.

This Cold War–era fallout shelter was actually a storage facility for the nation's emergency currency.

A southern Swedish island is home to the last ERSTA artillery battery, meant to protect the shoreline during the Cold War.

A former special storage facility for documents during the Cold War.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

Canada's subterranean Cold War museum has doubled as a movie set.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

In the 19th century, this pit housed a fully grown black bear for the entertainment of visitors. Today there is a sculpture in tribute to the poor creature.

The fading, forgotten remains of a once bright and booming factory.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

Perhaps the most beautiful of preserved saints, with a little help from Paris.

The oldest stone house in Paris was built by its most famous alchemist.

A once-fairy tale mansion now stands in a state of disrepair.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

One of ancient Etruria's most spectacular archaeological sites with impressive necropolises and rugged landscape.

This castle resides in a valley known for immense bloodshed during the Middle Ages.

The final resting place of New Orleans' most famous voodoo priestess.

A glimpse into the festive and private lives of medieval Europe.