The bridge that cost Germany a World Heritage Site.

When the rain falls, this drain system turns into a musical instrument.

This scenic spot is known as the birthplace of Switzerland.

These 20-foot jaw bones honor a time when the leviathan bones were a sign that whalers survived the hunt.

Along a coast that sees the annual migration of humpback whales, a geological formation that takes the shape of a whale’s tail.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.

Something's watching you.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This snug medieval lane is one of the narrowest streets in the world.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

A muddy alien landscape that is home to rare species of exotic plants.

A lover's walk between hilltop towns, decorated with graffiti love notes.

This ancient market is often referred to as the oldest shopping mall in the world.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

This historic electric train has operated with regularity since the early 1900s.

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

This Roman arena once played host to bloody gladiatorial battles.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

Spain's largest bullring offers a unique glimpse at architecture and history.

Long tunnels run under the ancient chariot racing circuit to the tower.