The world's largest military aircraft cemetery.

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

Dig for your own trilobites in this goldmine of invertebrates.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

This erect, phallic geological spire wasn't always named so domestically.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

The first declared National Monument in the United States.

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The highest bridge in America was built for an almost unnervingly small amount of money.

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

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

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

Rippling sand dunes frozen in the Arizona rock.

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

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

A fake mine that was made using real mining techniques which is also used as a community center.