The remnants of a failed socialist commune can still be found just off a California highway.

A collection of anti-communist sculptures stands watch in the Mojave Desert.

In one of the hottest parts of the Mojave Desert, shallow bedrock forces the typically dry Mojave River to the surface in this canyon, providing a vital oasis for humans and wildlife.

Colorful sedimentary rock layers provide opportunities both for hiking and photography.

A regular looking rock with an unbelievable history.

A ring of creosote bushes that are estimated to be 11,700 years old.

This strangely vacant Western amusement seems to be an empty tribute to residents of Lucerne Valley.

Hundreds of trees made from glass bottles make up this forest on Route 66.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

Thousands of turbines whir at at the origin of North American wind power.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

One of the most unusual geological features, recognizable from a dozen hit movies.

This giant temperature attraction created some giant electric bills.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

An Iowa town celebrates its heritage with the tallest working Dutch windmill in North America.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

This three-dimensional brick mural is the longest of its kind in the United States.

In rural Iowa, an imported 19th-century windmill overlooks an unlikely enclave of Danish culture.

The notorious couple camped at this site after a bloody shootout with police.

This lesser-known geographic marker was the reference point for all surveys of the continent for 75 years.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.