This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

This Transylvanian church has changed its denomination four times.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Gigantic Romanian salt mines used to heal respiratory conditions.

Something's watching you.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

A medieval church built up to defend its village.

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

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

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

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

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This once-derelict building is now one of the most beautiful bookstores in the world.

Romania's triumphal arch looks out over Bucharest.

This staircase full of Mayan hieroglyphics is perhaps the largest single text in the world.

Nine caves filled with recently-discovered archaeological finds under the houses and the streets of the most ancient district of an old town.

The eerie ruins of this feudal fortress witnessed the execution of 60 conspirators in 1387.

An unusual resting place built into the hill with an amazing view of Lake Como.

This clifftop arch is a natural stunner.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

A massive marble foot is tucked away in a small alley near the Pantheon.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.