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.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

The shape of this old salt factory complex was inspired by the course of the Sun.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The world's tallest bridge is also possibly the most elegant.

These ruins reveal the remarkably intact layout of a Roman marketplace.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

Elvis's own personal tropical hideaway.