The mark of the Devil's horns on a marble column in Milan.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Third time's a charm, or in this case, two testicles are.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

A massive mausoleum towers over the gravestones in a 19th-century Italian "model village."

A contemporary art installation housed within a Gothic cathedral.

These 2000 year old remains of a Roman aqueduct are hidden inside a hotel lobby.

This colorful statue welcomes visitors to a Barcelona park.

An early 20th-century bullring converted into a modern shopping center.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

A spiritual vortex among the red rocks in Sedona.

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

This jagged colossus of a building is mostly held together by an enormous concrete exoskeleton.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

America's most famous piece of self-built architecture.

Vancouver's only resting place for the city's deceased.

This conservatory allows a little bit of the tropics to thrive in the middle of a major Canadian city.

A student driver's nightmare.