18m long sarcophagus of a constantly growing dead prophet.

Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

A fortress-like granary that has been continually in use for more than nine centuries.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

This ceremonial Mexican square looks as though it belongs in a science fiction movie.

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

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

The ruins of an ancient city built by Mayan traders is centered around a temple of a sacred feathered serpent deity.

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

The enigmatic and seldom visited ruins of a Mayan city-state.

A notoriously corrupt Chief of Police's deteriorating Greek-themed playhouse.

A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.

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

Diego Rivera's massive tiled fountain and failed infrastructure project.

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

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

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

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

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

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