A stunning two-story timepiece within a medieval Brick Gothic church.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

This "floating railway" is one of the world's oldest monorail systems.

"The most colorful grottoes of the world.

An intricate and amazing house built by architect Karl Junker.

Living trees form the structure of an open-air palace.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Ruins of a German Castle on top of a towering stone pillar.

An eerie, derelict amusement park in Berlin.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

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

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

A slice of central Asia in the middle of Berlin.

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

Nursery with extensive collection of flesh-eating plants operated by the author of "The Savage Garden."

The world's foremost museum dedicated entirely to the abacus.

China's biggest e-waste village.

Massive fortified towers blend North American and Chinese architecture.

The largest traditional Chinese medicine market in the world sells ingredients that may make you squirm.

This ratty natural history collection is a charming relic among a city rushing into modernity.

The latest in a series of long glass bridges suspended at terrifying heights.

One of the world's largest malls has been almost completely empty since its opening.

China's mysterious record-setting sleeping Buddha.