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

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

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

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

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

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

This colossal ancient sculpture of the monstrous Aztec rain god has a literally stormy history.

On a cornerstone of the City Museum is the head of a monstrous serpent stolen from an Aztec pyramid 400 years ago.

These biodiverse university gardens form a green oasis amid the urban chaos of Mexico City.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

The burial place of some of Mexico's most prominent residents is full of macabre stories and hidden masonic symbols.

The ruins of an ancient temple to the Aztec wind god discovered in the middle of a metro station.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

At a museum of everyday objects, it is the act of collecting that is really on display.

Where layer cakes tower above one’s head and there is never a shortage of icing.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A museum in the former home of Marxist revolutionary Leon Trotsky.

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

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

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

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

66,000 pieces of art, donated by one of the world's richest men.