Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

The walls and streets of the ancient city are peppered with penises.

A lush indoor jungle fills this bustling Madrid transportation hub.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Hamburgers are intensely proud of their tunnel beneath the river.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This small museum in a 17th-century building honors three iconic Scottish writers.

The first mosque in the world to receive electricity.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

A fake Transylvanian castle houses a cathedral of antlers.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Hungarian mummies in beautiful painted coffins.

World's most expensive home.