Cold war icon and onetime "hole" in the iron curtain.

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

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

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

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

These spooky and unusual stone formations create an underworldly landscape.

An amazing clockwork museum in the Val de Travers holds examples of various prestigious legacies horological history.

These magnificent 240-year-old machines are considered distant ancestors of the computer.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

Museum of science fiction, utopias, and extraordinary journeys of the mind.

150-year-old satirical tableaus made from stuffed frogs.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

The university library shaped like a giant piece of Swiss cheese.

Swiss vineyards in a UNESCO heritage site.

Standing stones found on a construction site are re-erected.

Artworks by loners, prisoners and the criminally insane.

This secret Swiss fortress is disguised as a harmless pink house, complete with fake windows.

This long line of cement defensive wedges is named after the famous chocolate bar for obvious reasons.

Home of the Large Hadron Collider and the birthplace of the World Wide Web.

This famous writer's tombstone is a literary pilgrimage site that was publicly defiled by a rival.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

An exquisite Baroque church in Vienna's old town.