When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

This mysterious and unique painting is filled with symbolism.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

This technological marvel is one of the world's first 3D-printed bridges.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

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

This striking statue brings a scene from the African savannah into central London.

This statue and park honor the Swedish chemist Jacob Berzelius, one of the founders of modern chemistry.

The grand complex of buildings that comprise Liverpool's Exchange Flags includes a vast World War II bunker that has been frozen in time.

This enigmatic artifact is a rare depiction of an ancient Iberian noblewoman.

The ruins of the bathhouse used by the ill-fated last Aztec emperor still lie in Chapultepec Park.

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

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

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

Hidden in the courtyard of the Victoria and Albert Museum is a little-known tribute to two celebrity pooches.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

Beneath the most controversial monument in Mexico City is a cultural center that exhibits only digital art.

A heated statue pays tribute to one of Sweden's great actresses.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Along the most northwestern point in Africa is an ancient cave surrounded by legends.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.