This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

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

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

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

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

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

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

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

A menagerie of curiously bred creatures.

Model aircraft soar over 360-degree views of the countryside at the start of England's oldest road.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

Local legend holds that if you can make it up this steep cobblestone stairway without taking a breath, you'll have wish come true.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

In the heart of Tirana, this underground nuclear bunker has been transformed into a museum.

A museum dedicated to secret surveillance.

A mysterious bridge over a sunken Roman road.

An oasis of calm, nestled in the English countryside.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

A 14th-century Serbian Orthodox church that was once converted into a mosque under the much-disfavored Ottoman Empire.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

When construction began on this hotel, developers were surprised to find the ruins of an ancient civilization.