This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

A crumbling watchtower and a lighthouse overlooks the site believed to be the Sirens' cliff in the "Odyssey."

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

Macabre astrological automaton clock dating to the late 1400s.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

Ancient catacombs form the foundation for this Rococo orgy of a church.

The stunning interior of this Gothic church is covered in ornate gold details.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Elaborate tile work in this railway station tells the story of Portugal.

An early 20th-century bullring converted into a modern shopping center.

A hidden three-foot-wide house separates these two regal churches.

Five candy-colored villages on the Italian Riviera.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Created as a "model concentration camp" to hide Nazi atrocities from the international community, this former camp-ghetto now holds a museum and memorial honoring the lives lost within.

A striped 12th-century basilica sits in the countryside of Sardinia.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.