A self-built castle made by a mysterious man.

A tunnel with windows, so you don't miss out on the impressive views.

A monument to a survivor of harsh pioneer life, frostbite, and primitive surgery.

This quiet park's strange sedimentary spires were named after Kodak's color film.

A collection of haunted objects and macabre oddities under one roof.

One of the largest, oldest, darkest, quietest motel rooms in the world.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

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

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

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

This geothermal hot spring hides beneath a slowly growing mineral dome.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

A house carved into a rock in the 1940s.

The unusual burial monument of Arizona's first governor.