If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

The final resting place of the "father of special effects."

This demon atop the Notre-Dame de Paris looks utterly bored.

This annual harvest parade features intricate floats covered with fruits, vegetables, and seeds.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

The world's first floating farm is staffed by one human, three robots, and 35 cows.

This 17th-century house has a long and colorful history.

Rejoice at Amsterdam's ‘pop temple,’ a former church reborn as a raucous music venue.

What looks like an ordinary house from the outside is actually a rotating sculpture.

A bike traffic circle showcasing the works of local graffiti artists.

These giant yellow bowling pins seem to be defying gravity.

This windmill has been grinding pigments for traditional paints for more than 200 years.

This fake airfield was built as a decoy to protect a real airport from the Allied Forces.

A first-of-its-kind circular bridge for cyclists.

A massive, gleaming sea turtle with a rider atop its shell looks out over the horizon.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

The bones of the Biblical Magi traveled to Constantinople and Milan before landing in their current home inside an elaborate golden reliquary in the Cologne Cathedral.

A lovely biographical museum in the artist's home of 24 years.

The spectacular and eerie moss-covered grave site of 19th-century Belgian merchant.

A curious stone in a public square commemorates the victims of witch-burning.

One of the deepest indoor swimming pools in the world.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

The sacristy of this church contains remains and relics of members of the Aragonese royal family.