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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

The Suurhusen church tower in Germany leans over farther than the famous Leaning Tower of Pisa.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

A striking 12th-century-style castle built on the edge of a cliff.

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

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

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

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.

Thousands of abandoned statues of deities are taken to this hillside in southern Hong Kong.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

Renaissance villa and gardens complete with a tormented colossus.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Medicinal spa created with the discharge from a geothermal energy plant.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

A hill carving of the legendary dragon that terrorized the village of Bures in the Middle Ages.