This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

This mining town boomed in the Atomic Age when uranium was gold, only to be abandoned when the industry collapsed.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

A small town built on an abandoned airfield has former runways as streets and a bar and grill in an old airplane hangar.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A student driver's nightmare.

One part local history, 99 parts gruesome haunted house.

Hidden beneath the streets of London is a secret subway that only carried mail.

This former mining hub holds a surprising abundance of undisturbed relics from the Old West.

A tiny wilderness cemetery commemorates the deadliest episode of the Klondike Gold Rush.

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

Natural earth mounds formed in the far north.

This house of worship in the Arctic Circle is shaped like an igloo.

This greenhouse was once a hockey arena.

A mad mystery man who led Canadian mounties on a 150-mile wilderness chase is still buried with his secrets intact.

This tiny square mile of Canadian sand was once considered the world's smallest desert.

The picturesque remains of an abandoned silver mine slope down to Tagish Lake in the Yukon.

These hellish-looking cliffs in the Canadian Arctic have been burning for centuries.

The remote graves mark the mysterious deaths of four 19th century explorers.

The third-largest island in Canada is one of the remotest places on Earth.

A 17th-century church is nestled within the walls of a 15th-century ruin.