This once-booming Gold Rush town is now home to a herd of feral donkeys.

This golf ball–shaped former desert real estate office now houses a UFO museum.

Two geoglyphs that are truly unique to North America.

Nothing to see here.

Millions of years of erosion created the feature for which this rock formation is aptly named.

Hike up to this ancestral grain storage site, but don't touch.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

A historic hydroelectric power plant serves as the unusual backdrop for a public park.

Extraordinary sculpture garden created by an eccentric English poet.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

Legends surround this jagged rock formation in the New Mexico desert.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Visiting this grotto is symbolic of a spiritual journey into Nirvana.

This grand temple complex from the Old Silla era of Korea is home to a stone pagoda that was build in the 7th century.

An early Korean refrigerator.

A monument to the two U.S. officers killed by North Korean troops while trying to trim a poplar tree.

This human-made pond is part of a Korean palace complex first built in the 7th century.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

The best place for scenic views of the DMZ and North Korea.

Numerical symbolism abound at East Asia's oldest observatory.