Eons ago, a rushing lava river formed this pristine passage through solid rock.

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

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A self-built castle made by a mysterious man.

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

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

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

Dramatic river bend surrounds a natural red-rocked pedestal.

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

Rippling sand dunes frozen in the Arizona rock.

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

Monument to the cotton-destroying boll weevil.

This 12-foot-tall T-rex is the largest K’Nex skeleton sculpture in the world.

Come for the boats, stay to explore the intriguing assortment of art.

Tucked away atop a quaint Alabama pharmacy is this tiny display of antique medical tools.

This small hut in the middle of a parking lot was once the wooded sanctuary of the 'Hermit of Montrose.'

Designed by Maya Lin, the memorial honors 41 individuals who died fighting for equal rights between 1954 and 1968.

Cadillac where country's first big star was found dead.

Alabama has a fiberglass Stonehenge. With apologies to Spinal Tap, this one is full-size.

Orr Park's dead trees have been carved into a menagerie of whimsical visages.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

A former taxidermist has turned his old shop into a folk art mecca.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.