Underneath the historic center of Mexico City, the remains of a temple dedicated to the Aztec god of the wind.

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

One of the world's richest men bought this former paper factory and transformed it into a mall.

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

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

An early 20th-century bullring converted into a modern shopping center.

Mountain where Jesus was first tempted by the Devil.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Single runway interrupted by a busy road that cuts across its middle.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

Pilgrimage site for star-crossed lovers.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

Go surfing on this urban wave, "hacked" by local surfers.

A fearsome dragon clings to a corner of Munich's city hall.

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

The celebrated eyesore created by starry-eyed sweethearts.

A diminutive statue that was inspired by the sculptor's own daughter.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.