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

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

The labyrinthine home of the National Archives of Estonia is an experimental blend of architecture, art, and history.

Built to ward off Napoleon's army, this city-sized abandoned Russian fort is now perfect for urban exploration.

Mysterious craters may have been home to an ancient cult.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

This impressively complicated radioastronomy research center was once a tool of Soviet spies.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

What almost started out as a spite house became an eccentric's found object masterpiece.

A unique museum dedicated to the famed Soviet director and other cinema greats.

A city block packed with whimsical sculptures that seem to be plucked from a tiled fantasy world.

The school produces some of Africa's most talented acrobats and contortionists.

A tower-like theater in the Swiss Alps built to withstand the high winds and avalanches of the mountain pass.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.