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

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

The conquistador's former fortress is the oldest preserved colonial building in the Americas.

This colossal ancient jaguar sculpture was used as a vessel for the hearts torn from sacrificial victims.

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

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.

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

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

This artificial archipelago was supposed to resemble a map of the world.

This indoor ski resort has a mountain contained inside a mall.

Ancient serpentine sacrifice holder that has stood the test of time.

The ancient latrines of the Greeks, in all their public glory.

Mausoleum and Holy Seat of Antiochus I of Commagene.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A Turkish monastery tucked into a cliff wall.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

Ottoman-era houses lovingly preserved.

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Only a handful of these gorgeous historic waterwheels remain but even those are in danger from local unrest.

What is left of the pillar of Saint Simeon, the voluntary martyr who climbed the column to give his sermons, remaining perched there for thirty-seven years.