Hidden for more than a century, the grave of the Conquistador remains forgotten behind these church walls.

These museum grounds are a Dalai Lama-declared peace oasis.

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

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

This French cemetery houses some of the most exquisite examples of funerary art in Mexico City.

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

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.

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

The ruins of the bathhouse used by the ill-fated last Aztec emperor still lie in Chapultepec Park.

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

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

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

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.

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

Part bookstore, part café, and part forest.

This palatial building has lived many lives as a convent, prison, cultural center, state archives, and government offices.

This cluttered cantina is famed for its cheese-spiked, raisin-flavored liqueur.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

A beautiful example of 18th-century engineering still standing tall.

It was dubbed the "Garden of Plates" because it's covered in pieces of discarded dishes.

This historic Mexican convent is home to a tree that grows crucifix-like thorns.

A hidden room within the church displays an amazing collection of old choir books.

The remains of a centuries-old water system that inspired local legends of secret tunnels.