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

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

The former headquarters of Mexico's Secretariat of Public Education now houses a muralism museum, including Diego Rivera's first large-scale mural project.

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

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

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

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

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

Part bookstore, part café, and part forest.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

This is the oldest Roman-made bridge in the city still existing in its original state.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

100 year tradition of fist fights, marked by marble footsteps.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Go inside to really appreciate this 500-year-old technological masterpiece.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Five candy-colored villages on the Italian Riviera.

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

Pompeii's less famous neighbor is still revealing her secrets.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.