This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Architectureal fantasy quarter of Rome.

An alchemist's "magic door" stands in the middle of a Roman park.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

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

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

Mexico's National Sound Library houses music, recordings, and voices from the nation's rich past.

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

This ancient structure was built by a mysterious civilization that was largely destroyed by a volcanic eruption.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

These strikingly colorful paintings were created by a mysterious Mesoamerican civilization.

The grounds of this former dairy hacienda now contain an entire town inspired by Tuscany, Italy.

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.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

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

This cluttered cantina is famed for its cheese-spiked, raisin-flavored liqueur.

Hidden inside a hotel is a museum of miniature models depicting the traditions and history of Mexico.

This beautiful and unmissable little museum is full of fascinating artifacts from Mesoamerica's great civilizations.

This palatial building has lived many lives as a convent, prison, cultural center, state archives, and government offices.

The "world's smallest volcano" has been used to store meals and dispose of dead bodies.