Roman ruins top white travertine terraces formed by ancient hot springs.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

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

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

A sculpture for the sun and stars, created by Nancy Holt.

A house carved into a rock in the 1940s.

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

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

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

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

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

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

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.

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

Dig for your own trilobites in this goldmine of invertebrates.

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

The longest living non-clonal organisms on Earth.

A picture-perfect town, perfect for blowing up.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Odd outsider art installations surround a Gold Rush-era ghost town.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

This naturally-sourced hot spring is now home to a clothing-optional resort.

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