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

Mexico City's largest market contains a Willy Wonka-esque wonderland.

A small pack of an ancient, hairless breed of dog once believed to guide souls through the underworld lives on its grounds.

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

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

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.

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

An island filled with hundreds of hanging, decomposing, decapitated dolls.

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

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

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

A close look at the church's walls reveals pieces of Mexico's history.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

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

Frida Kahlo's childhood home, now a museum of her life and works.

The Mexican painter Diego Rivera created this unusual museum to display his collection of pre-Hispanic artifacts.