France's high-tech, future-themed amusement park.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

One of the world's heaviest musical instruments towers within a popular urban park.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Where the lovelorn find a home for their sentimental keepsakes.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

A whimsical bridge adorned with decorative dragons.

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

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

Old Danish castle immortalized in Shakespeare's Hamlet.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The topiary maze at the Habsburg hunting lodge.

Climb to the top of the world's largest seated bronze Buddha.

A musical instrument played by the sea.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

The oldest arboretum on the Dalmatian coast doubles as the gardens of Kings Landing in "Game of Thrones."

The now-overgrown beach resort was once frequented by Yugoslav military elite.

An underground city of salt.