An abandoned NSA listening post on Berlin's "Devil's Mountain."

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Started as a kitchen garden, now the second largest botanical garden in the world.

A surreal museum of extraordinary industrial objects.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

This human-made pond is part of a Korean palace complex first built in the 7th century.

The name of the only golden Buddhist temple in Korea translates as "the temple that protects the country."

A unique structure located on the grounds of one of five grand palaces that were built by the Joseon dynasty.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

South Korea's women of the sea have completely flipped their society's structure by becoming revered fisherwomen.

Buy your fish and have it cooked to order in this bustling, eight-floor seafood market.

Step into a cartoon at this Seoul café that aims to evoke a two-dimensional scene.

The celebrated eyesore created by starry-eyed sweethearts.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Paris' linguistic guide to the international language of, yes, love.

France's most famous cemetery, with some of its most curious tombs.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

A surreal statue honoring Prague's favorite literary son.

This spooky statue sits outside a famous Prague theater.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Looming communist pillar with a Czech twist.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A mocking tribute to the past and modern leadership of Prague.