The only castle in North America to ever house European sovereigns.

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

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

Colonial architecture meets urban art in this sprawling open-air gallery.

An island graveyard with spectacular views of the Caribbean.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

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.

The scene of a legendary hunt is displayed on this building's facade.

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

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

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

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

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

One of the most easily accessible examples of the rare 1960s UFO houses.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The most impressive of Basel's three remaining city gates.

A futuristic rocket marks the spot where three borders meet.

Shipwrecks, ruins, and turtles are all that remain on this haunting Caribbean ghost island.

The mouldering manses of wealthy colonials still pock the streets of a Curaçao neighborhood.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.