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 reproduction of earth's many biomes.

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

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

A sharp bend in a dramatic river canyon cut through red rocks.

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

Rippling sand dunes frozen in the Arizona rock.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

A Roman-style column in Oregon hides a spiral staircase inside.

This perfectly preserved Chinese medicine shop was untouched for decades before being reopened as a museum.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

A maritime museum holding the remains of Blackbeard's pirate ship.

A wonderful display of arts and crafts handmade by local artisans in the Southern Appalachians.

A folk art mecca famous among outsider art fans.

Inside a humble hangar is some of the best roller derby the world has to offer.

A sculpture of a salmon swimming through a brick building.

The magic's in the hole!

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

The largest source of fossilized insects anywhere.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

This Wyoming town is fascinated by a particular mythical creature.

An experimental, automotive replica of Stonehenge.