The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

On Japan's Tashirojima Island, cats are king.

A collection of human remains, animal body parts, and other macabre curiosities all legally for sale.

A historic hill of tall tales, with one rather special tree.

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

Banksy gives themself artistic license with this piece of London street art.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Indents in the pavement are all that remain from a grisly death machine in Paris.

Lost subway station nestled beneath Toronto's busy commuter line.

Hidden amid the tropical forest in the Caribbean Sea are the decaying ruins of the Cocaine King's luxurious island party home.

An explosion of natural color known as "the river that ran away from paradise."

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