A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The official motto of Luxembourg reminds passersby of the Luxembourgish commitment to their national identity and sovereignty.

This magenta statue commemorates the legendary marriage between a mermaid and the city's founder.

A hidden bas-relief of a hare on a church main portal that brings good luck to the ones who find it.

A medieval tower with a suspended iron cage used as an open-air jail for criminals who were exposed as a warning.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

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

Bell tower juts out from a village buried under a lake.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The vibrant buildings in the “capital of the comic strip” celebrate the art form that made it famous.

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

A small house sits between two huge rocks, with its back to the sea.

This ancient theater was once the home of fierce gladiatorial battles.

Construction of this bridge was once described as an "act of violence" against a neighboring country.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

An ornate private entrance to the Vienna subway built specifically for the emperor.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

This museum inside a museum tells the story of London's timepieces.

A clock designed to run with perfect accuracy for 10,000 years.

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

This poignant display is now a memorial to these regionally extinct species.