Few of the many visitors to this resort town know of its hidden Maya ruins.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

This snug medieval lane is one of the narrowest streets in the world.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

Fantastic views and thousands of love locks.

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

Hidden in plain sight, this creepy sculpture watches from above.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

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

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

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

This colossal ancient sculpture of the monstrous Aztec rain god has a literally stormy history.

A museum in the former home of Marxist revolutionary Leon Trotsky.

These unusual paintings give thanks to the saints and deities who granted people favors and miracles.

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

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

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

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

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