This now-abandoned shopping center in Playa del Carmen was built to resemble a medieval European castle.

This gem of Moorish architecture is slowly disintegrating along the coast of this charming town.

Once one of the largest sites of silver deposits in Italy.

This nearly abandoned "company town" is a ghost of Puerto Rico's once-lucrative sugar industry.

Mysterious Spanish catacombs of unknown origins.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

The ruins of this magnificent Scottish castle blend both Gothic and Renaissance architectural styles.

A purr-fectly spirited bronze celebration of local street felines through history.

Home to 800-year-old zen basin, a 400-year-old pilgrim’s path, and a century-old industrial grotto.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Most-visited and most-photographed slot canyon in the American Southwest.

An eerie, derelict amusement park in Berlin.

A crumbling hospital from the 1850s on Roosevelt Island.

Rippling sand dunes frozen in the Arizona rock.

This arch was featured prominently in the film.

This rusted car found in Petrified Forest National Park's Route 66 exhibit may be the most photographed abandoned car in the country.

A collection of soda memorabilia that spans decades.

This eerie sculpture overlooks what was known as the Road of Bones under Joseph Stalin.

A well-preserved example from a 1920s network of airmail navigation arrows sits near Interstate 15 in southern Nevada.

One of the best places to dig—some say on the planet—for six different types of chalcedony.

Hike along an abandoned railway up to a popular pilgrimage site.

An underground city beneath Krakow's postwar socialist utopia.

The site of one of the only two star-shaped forts in Japan was used as an elementary school for over a century, much longer than its life as a castle.

The second-tallest water tower shaped like a peach in the American South.