The Netherlands' first car tunnel has an unusually rectangular shape.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

A giant floating rubber duck-bunny painted with a different design every year.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

One of the world's tallest statues is also one of its most hated.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

3,000 market stands in five former Zeppelin hangars.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

Where Venice's gondolas go for a tune-up.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

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

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

A century-old prison in the heart of Vilnius is now a lively bar, dance club, and artist residency.

Over time, this castle grew to encompass the entire island.

This former KGB building is now a museum memorializing the people who suffered during the Soviet regime.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.

This one-time health resort was used by aristocrats around the world.

The prototype for all Nazi concentration camps.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”