Modern museum, designed for Jihadi tourists.

A patchwork of ruins from various civilizations in one of the world's oldest continually inhabited cities.

A monumental underground karstic wonderland is also the water source for over a million citizens of Beirut.

The largest hewn stone in history.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

Catacombs turned marketplace.

You can still see bits of the camouflage used to hide this Art Deco building from bombers during World War II.

A historic arboretum and non-conformist, non-denominational park cemetery.

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The first regular high-definition TV transmissions were made from this seemingly out-of-place mast located on one corner of a Victorian-era entertainment venue.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

At this small museum, visitors can view artifacts from the only battlefield in London during the War of the Roses.

The turquoise-studded skull of a long-dead Aztec man sits within Mexico City’s Museum of Anthropology.

A kaleidoscopic warehouse-maze of handmade neon signs.

Home to a dizzying array of letterpress blocks with a rich history.

An eerie diorama that captures the majestic nature of a few prehistoric-looking beasts.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

The library's graceful rotunda is like a bibliophile's temple.

This adorable birdlike police box is designed based on a play on words.

A garden in Lisbon filled with giant porcelain creatures.