People have been living in the cave houses on this Italian hillside since the Neolithic era.

This rare collection of human deformities displays fetuses with two faces, one eye, and "mermaid" legs.

This Transylvanian church has changed its denomination four times.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

The remains of an abandoned air force hospital located on a redeveloped Air Force base.

This lake in northwest Iran has started turning from green to red more frequently than scientists are comfortable with.

Created as a coal reserve, it is today a natural park with stunning wildflowers, ancient marine fossils, and remnants of a 19th century mine.

A statue erected in honor of the toadish nickname given to Jersey residents by the French.

A quaint Russian village in the middle of a German metropolis.

The tallest freestanding structure in the United Kingdom.

There are thousands of tributes and memorials to the King, but none quite like this one in a Kraków city park.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

Legends of time travel and magical woodland creatures bolster the natural charm of this verdant sanctuary in the midst of Moscow.

These massive moving sand dunes have swallowed an entire village and are still on the run.

For a century, the tallest building in Tasmania was a tower built to manufacture ammunition.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

These ruins in Volvi were once at the intersection of the Eastern and Western Worlds.

A museum in England’s Lake District dedicated to the trusty pencil wants you to know the story of their World War II spy pencils.

A monument to the man who almost killed Hitler.

This odd 1930s shop remains stranded in time and shrouded in mystery.

A majestic mansion designed in Mughalai style, complete with a turquoise onion dome.

A Cold War secret surveillance tower used to spy on radio communications.