On a cornerstone of the City Museum is the head of a monstrous serpent stolen from an Aztec pyramid 400 years ago.

Hidden for more than a century, the grave of the Conquistador remains forgotten behind these church walls.

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

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

This museum houses two of Mexico's most impressive Aztec monoliths.

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

These subterranean models show Mexico City's central square during three different eras.

This clock was gifted to Mexico as a show of gratitude for its long history of welcoming Arab migrants.

This pre-Hispanic apartment complex also includes ancestral paintings that point to its military past.

A striking depiction of Teotihuacan's mysterious "Spider Woman."

Cool down and fill up after visiting Teotihuacán at this bar and restaurant in a deep, underground cave.

This archeological site hidden behind Teotihuacán's pyramids shelters 1600-year-old murals.

These millennia-old murals once covered the walls of residential complexes across the ancient city.

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

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.

Legend says one of the world's largest marine geysers is actually a whale that got wedged within the rocks.

This seaside production studio was built to film 'Titanic' and has been the wet set of choice for other Hollywood productions since.

Rising out of miles of farmland, these buttes are sometimes called the world's smallest mountain range.

I Street Bridge is the heaviest swinging center bridge in the United States.

The California capital city once stood 10 feet lower than it does today.

Art Deco stylings conceal the true nature of this bridge.

It is locally loved and ridiculed for literally looking like poop.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.