This extraordinary art museum is like a secret world on the edge of Mexico City.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

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

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

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

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

Every equinox this Maya pyramid puts on a spooky ancient light show.

The famous artist couple lived and worked here, in two different houses connected by a bridge.

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

A Christian monastery stands on what was once a holy Incan temple.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

An Inca spa, military outpost or maybe… both?

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

This stone complex marks the urban center of a lost civilization.

Did Inca children also slide down these smooth rocky slopes above Cusco?

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

Death rituals and sacrifice inside a Peruvian megalith.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

Huge stone depressions which may have acted as an Incan agricultural experiment.