Romans built the world's tallest artificial waterfall in 271 BC.

One of seven Jewish catacombs in Rome and one of only two open to the public.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

2300-year-old Roman road connecting the empire.

Geothermal waterfalls in Tuscany.

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

The most visited, and possibly most controversial, museum in Germany.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

A fearsome dragon clings to a corner of Munich's city hall.

This painted Lego bridge is the product of over a century of locomotive history.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

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

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

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

This award-winning men's bathroom was just too beautiful to not allow women to see.

Live long and prosper in Tennessee.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Walk the whole Mississippi River!

Visit this playground of waterfalls, caves and sinkholes.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.