The unexpectedly beloved remnants of a controversial thermal power plant.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

A luxury hotel housed in a former 15th century Gothic church.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

This German art chapel is perfect for those who like their worship hard, modern, and utterly alien.

The highest point in Belgium is a staircase to nowhere.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

Witness traditional silk production in the Uzbek city that's been a hub of sericulture for over a thousand years.

This park feels like a lush little jungle full of wildlife nestled within São Paulo.

This singular art museum in São Paulo is unique inside and out.

Four giant movable street lights decorate this modern Rotterdam square.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Wander among free-roaming storks at the sanctuary that helped save them from local extinction.

This statue honors the thousands of Allied avians that served and died for France during World War I.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

The biggest drug trafficking passage between Mexico and the U.S.

A geological mystery on Camelback Mountain.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.