A small flooded ghost town with a few scattered structures remaining.

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

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

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

Dramatic river bend surrounds a natural red-rocked pedestal.

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Rippling sand dunes frozen in the Arizona rock.

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

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

A house carved into a rock in the 1940s.

A strange house built only at night, with rumored mystic inspiration.

Mining town from the late 1890s, once home to Calamity Jane.

Every fall this lake mysteriously drains, like a bathtub with the plug pulled out.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

A ruined hotel with an unlucky history and an eerie present.

Abandoned hotel with adjacent lake and golf course.

The rocks in this arid basin leave trails of movement behind them.

Marta Becket's hand-painted theater in the desert.

Michael Heizer's masterwork in the Nevada Basin.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

The haunting ruins of Jack London's dream house.

Where a staggering 747 ships were constructed during World War II.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.