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

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Despite his legacy of work in Spain, Cuba, and Florida, the larger-than-life writer's grave is a simple affair tucked in an Idaho cemetery.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

Home to the deepest rift anywhere on Earth.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

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

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

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

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

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

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

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

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Massive still life just off the highway in Kansas.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

Curious rock formations in a tiny Kansas state park.