The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

The final resting place of the great navigator, or maybe his brother.

This former coal gasification plant found a curious second life as a popular public park.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

People escaping slavery may have hidden inside a corpse vault.

This blowhole is supposedly caused by a trapped monster.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

See massive fossils that are over 200 million years old in northeastern Arizona.

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

This highest peak in New Mexico is named after an explorer who had a habit of lending his monicker to peaks.

A unique geological area spiked with wind-carved rocks that resemble teepees.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

A cave's rare beauty held a cavernous secret hidden underground.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.