The grand complex of buildings that comprise Liverpool's Exchange Flags includes a vast World War II bunker that has been frozen in time.

During the holidays, a vintage subway train whisks New Yorkers back in time.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

This abandoned Antarctic research station is a Soviet ghost frozen in time.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

Life-size figures portray depot attendants, train crew, and passengers frozen in time at the oldest railroad station in Arkansas.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

After this former brothel closed, its interior remained almost frozen in time.

An abandoned Ecuadorian prison that once held ex-presidents and notorious con artists is now a carceral museum.

A small part of Russia that does not touch any other part of Russia.

Gold, silver, copper, lead, and zinc were once extracted at this abandoned mine near Lookout Mountain.

The solitary cairn marks a mysterious death that's still controversial more than two decades later.

Outside a market, beautiful murals pay tribute to fruit sellers and farmers, as well as a few legendary artists.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

The other side is actually green.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

This aircraft museum is home to one of just three Halifax bombers in the world.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

The final resting place of England's most notorious bandit.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

Makers and sellers of the original and finest York Ghosts.

An incredibly well-preserved piece of ninth-century Viking poop.

The little-known second castle that William the Conqueror built in York.

One of the shortest streets in York has an especially odd name.