This abandoned convent keeps the tomb of a legendary beheaded princess.

A rather vulgar example of the transition from Latin to the Italian vernacular.

Neo-cave art on the macro scale.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

The house that birthed The Old Man and The Sea is now a museum devoted to the old man who wrote it.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

A hacienda that features all things uniquely Yucatán.

Iconic red and white plaques show the creative names invented to navigate the city streets.

Three sinkholes filled with warm, crystal-clear water reached by a horse-driven cart on an old train track through the jungle.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

This skeletal, unfinished Gothic church once housed a miraculous masterpiece by Raphael.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

An ancient octagonal weather station named for the eight Greek gods of wind.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

An ancient underground cultic temple where sunlight penetrates on the summer solstice.

The mosaic floor of a 4th-century synagogue features a pagan zodiac wheel alongside traditional images of a Torah ark and menorahs.