The 19th-century ruins hide deep in an overgrown forest.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

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

This remote desert watering hole has a connection to a curious chapter of American history.

A spiritual vortex among the red rocks in Sedona.

The U.S. Air Force has an anti-satellite laser weapon.

A blacklight journey through a celestial art exhibit.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

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

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

An urban laboratory.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

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

This dark, quiet forest on the outskirts of San Diego is dense with rumor and lore.

The overgrown ruins of a once thriving World War I-era copper mine.

A UFO scrapyard in the California desert.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.