This neighborhood was built in the golden age of Art-Decó, and its buildings are essential to understanding this style

This crumbling Art Deco movie palace in Mexico City has been abandoned for two decades.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

The former headquarters of Mexico's Secretariat of Public Education now houses a muralism museum, including Diego Rivera's first large-scale mural project.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

A scientific repository of goiters, boils and other ailments throughout Mexican history.

At this bright and vibrant museum in Mexico City, you can make your own custom scent.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

The metal leaves on this tree are engraved with the names of Holocaust victims.

This sculpture honors the man who was known as the "Righteous Among the Nations."

These relics of the city's past now exist as a prominent modern feature.

A mechanical clock built in 1914, with a rotation of 12 historical figures on its face.

Baroque celebration of the end of the Great Plague of Vienna.

The final resting place for the remains of 143 Habsburg royalty.

Designed as a reminder of one of the darkest moments in Austrian history.

A somber statue commemorating a Danish merfolk-tale.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

This sculptural representation of an Andersen fairy tale had to be pushed away for being too grim.

Denmark’s oldest bakery is home to the 'Wednesday Snail,' one of the best cinnamon rolls on the planet.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

The only remaining wind-powered paper mill in the world.