The highest bridge in America was built for an almost unnervingly small amount of money.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The largest self-built castle in the U.S., six decades in the making.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

Half-hidden by grassy slopes, this striking Spanish colonial fort is now a museum of underwater archaeology.

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

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

It's believed this golden brick is part of the legendary lost Aztec treasure.

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

The turquoise-studded skull of a long-dead Aztec man sits within Mexico City’s Museum of Anthropology.

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

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

The most complete statue of this Aztec god sits a top a throne carved with images of hallucinogenic plants.

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

This ancient jade mask depicting the Zapotec bat god was found in the ruins of the pyramids of Monte Alban.

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

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.

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

Part bookstore, part café, and part forest.

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

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