Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

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

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

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

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A Serbian church lit by chandeliers made of weapons.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

What happens when you cross a mayor and a painter?

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

This stone figurine was made more than 6,000 years ago and depicts a female deity of the Neolithic Vinča culture.

A futuristic, brutalist masterpiece that is also strangely prison-like.

A 11-foot former president stands on a Kosovo street that also bears his name.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Cryptic messages embedded in the New York City sidewalk.

This Underground station has been a popular filming location for decades, even before it closed.

Death road of Bolivia.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

This banal Parisian entranceway is not what it seems.

A surrealist timepiece by the artist of melting clocks.

The video game-themed street art first popped up in the French city.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.