A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

This popular pilgrimage site offers a hole filled with holy healing dirt.

The house's confection-like decorations are the result of one man's painstaking work over decades.

A Bhutanese temple gifted from the isolated Himalayan kingdom is now a surprising cultural gem located at the University of Texas at El Paso.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

Hidden in the New Mexico desert southeast of Roswell, nine small deep lakes formed inside sinkholes.

A somber monument commemorates the site of a Native American reservation marked by suffering.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

A clear blue swimming hole with hidden caves, still unexplored.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

The ruins of this abandoned fort now stand as a picturesque reminder of America's march West.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

This unassuming layer of clay boasts an out-of-this-world origin story.

This small piece of railroad history sits behind the parking lot of a chain grocery store.

A roadside attraction filled with an astounding array of gloriously wacky vehicles.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

The largest self-built castle in the U.S., six decades in the making.

This historic stone barn is the former home of legendary cattleman Charles “Lonesome Dove” Goodnight.

This three-mile concrete levee in Pueblo, Colorado was transformed into the world’s longest painting.

A mental health hospital dating back more than 139 years, now features a museum.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

Community owned and operated, this property is home to a diverse set of nudists.

Hidden high on a remote mountain peak is a humbling and mysterious Vietnam War memorial.

The giant stump of the once towering cottonwood where Ute people held tribal meetings.