This narrow Ghent alleyway is an officially sanctioned street art tunnel.

This ancient city - home to nine civilizations - is soon to be buried under 200 feet of water.

This micro-nation may be some sort of prank, but its constitution sure seems official.

These 13th century documents come housed in 18th century shelves organized by a 19th century historian.

Just another terrifying garden filled with hundreds of endlessly smiling doll people.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

Despite being tiny and rural this Georgian airport looks like a sci-fi boondoggle.

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

A site of natural wonder and flying coconuts in Samoa.

The only things left in this abandoned Latvian graveyard are a mysterious stone and a ghost story.

The gutted remains of this Estonian mansion are a monument to a tragic love.

This abandoned fighter jet launch center is now a haunting street racing course.

An alien church provides much needed silence in the midst of a Finland shopping center.

Tucked away in a small German apartment is an eclectic museum devoted to West African vodun culture.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

This small Estonian hill is covered in hand-made twig crosses that are said to bring good luck.

This wooden recreation of a 9th century lake village looks as though it was built yesterday (which it relatively was).

This historic Australian bridge was built by convicts with giant stone spikes to prevent cattle from falling off the sides.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

This old Estonian mine has been kept like a sprawling time capsule of the local shale industry.

This 12,000 year old Iranian cave village has been continuously inhabited for over 3,000 years.

The secret cells in the basement of the KGB's Estonian "Grey House" have been preserved as a grim Cold War museum.

This ancient burial mound is accessed by an impressive Greek-built archway.