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

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

Inside this mountain lies several kilometers of breathtaking caves.

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

The singular ruins of a mysterious lost city.

An indigenous take on European design creates a stunning visual overload.

A barbarous band of serpents guard the bases of these Aztec temples.

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

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

A dark tunnel leads to a striking white crater that seems to be from another planet.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

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

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

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

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

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

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

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

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

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

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

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