This hidden alley near the location of Rome's first theater was the site of a curious miracle.

A meteorite-bounded town in Bavaria.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

Amsterdam's former hotspot for public executions and dissections.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

Europe's official "zero-level," the equator of elevation.

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

This colorfully-painted tunnel links two distinct parts of a historic neighborhood.

An early 19th-century English style garden hidden in the Rotterdam cityscape.

A condensed piece of China floating in a Dutch harbor.

A bridge that has seen many reiterations over its lifetime.

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

This small museum located under the famous cube houses, is home to some 30,000 chess pieces.

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

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

Countless grotesque faces stare out from this eerie Prague art wall.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

Looming communist pillar with a Czech twist.

A series of playful yellow penguins share a serious message about the environment.