This balancing rock is one of Utah's most unusual geological formations.

This former Portuguese defensive fort atop a hill was occupied for thousands of years.

More than 500 years after his death, a medieval ruler's remains were found buried under a parking lot.

A sign marks where the two bodies of water meet.

Secluded springs in the Rio Grande Gorge offer hot bathing beside the haunted ruins of a stagecoach stop.

A 15th-century Corsican chapel that possesses a rare Catholic monument: a "Scala Santa," or "Holy Stairs."

These 2000 year old remains of a Roman aqueduct are hidden inside a hotel lobby.

This "witch's market" is filled with Amazonian herbs, remedies, and the occasional libido-strengthening tincture.

Experience life in one of America’s smallest neighborhoods.

An abandoned mountain village in Habib surrounded by walnut, apricot, and pomegranate trees.

Local legend holds that if you can make it up this steep cobblestone stairway without taking a breath, you'll have wish come true.

A large wave-cut shelter, a major archeological site, overlooks the dry basin of Winnemucca Lake.

This cheery fruit farmer welcomes visitors to a classic roadside emporium.

Snapshots of late 19th and early 20th century Americana, focused on life on the plains, are displayed in this museum.

Browse through a century of this principality's first popular export.

A short tunnel built straight through a magmatic dike.

This 18th-century water provider for Aranjuez was refurbished in 2013 only to be neglected again.

The first railway tunnel to cross the Continental Divide and, at 11,523 feet, was once the highest railroad tunnel in the world.

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

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

A medieval village, with red wooden cottages around a stone church, stands as a well-preserved example of a settlement type that was once common in northern Sweden.

These 4,444 wooden steps straight up a mountain were built to serve a hydroelectric power station but these days, they're mostly used by hikers.

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

Take in a sweeping views of Guanajuato—and save yourself a hike up a steep hill—on this funicular.