A 130-year-old urinal is the oldest of Stockholm and perhaps all of Sweden.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

Stockholm's deepest subway station is also a stunning ecological wonder.

It houses the remains of a 17th-century version of the Titanic.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The turquoise-studded skull of a long-dead Aztec man sits within Mexico City’s Museum of Anthropology.

In Coyoacán, a pair of coyotes crown a public fountain in reference to the ancient Aztec name of the borough.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

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

The most complete statue of this Aztec god sits a top a throne carved with images of hallucinogenic plants.

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

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

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

The only castle in North America to ever house European sovereigns.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

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

A set of seven houses, each built in a style that represents a European country.

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

One of Amsterdam's narrowest houses is located right across the canal from its widest.

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

A surrealist timepiece by the artist of melting clocks.