Long abandoned underground complex to keep royals safe from a nuclear war that never came.

This series of Scottish caves has no clear purpose other than baffling historians.

A secret garden in a picturesque Edinburgh village has inspired artists for centuries.

Annual technopop celebration of peace and love.

Apartment complexes built into huge repurposed natural gas tanks.

The souls of the dead have made these Ghanese crocodiles shockingly docile.

Topless shrine of northern Ghana.

At Ghana's largest wildlife refuge you feel like you're right in the animals' backyard.

The first mosque in Ghana is known as the "Mecca of West Africa."

Where thousands of slaves passed through the "Door of No Return."

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

The world’s largest digital waste dump has become a site where organized criminals hack into confidential government data.

The clever workshop that has been designing some of the most unusual coffins imaginable.

The central mosque of this Mali town is entirely built from mud.

The Voodoo Superstore of the world.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

The world's largest collection of witchcraft regalia.

An astounding collection of medical specimens, including bits of President Lincoln.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A curious collection dedicated to human and animal anatomy and pathology.

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

Artfully arranged bones of 5,800 Austrians.