A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

A photogenic rock-art site that is also a popular climbing and canyoneering area.

Named after an outlaw who used the basin as a hideout.

The highest concentration of petroglyph sites in Gold Butte National Monument, plus an improbable early 20th-century dam.

An unexpected sinkhole in a desert flat within Gold Butte National Monument.

A spectacular slot canyon at the northern edge of Lake Mead National Recreation Area.

Harder layers in colorful sandstone weather out as prominent “fins" and even more intricate and bizarre shapes.

Narrow slot canyons in a badland eroded into soft sedimentary rock provide an otherworldly landscape in this remote Nevada state park.

A hidden slot canyon in the southern Nevada desert makes an unexpected oasis and scenic hike.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

This central Nevada cave is the spiritual home of ancient and enigmatic pictographs.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

An eatery for UFO seekers on the Extraterrestrial Highway.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

The drama of nature in full effect in this Nevada State Park.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

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

A mining camp built around an unexpected occurrence of silver.

Next to Salt Lake City's Assembly Hall stands a tribute to some unlikely heroes of early Mormon settlers.

A late-19th century diversion canal built by hand crosses Bryce Canyon National Park and is still in use.

Although it also features red, orange, and variegated cliffs of Navajo Sandstone, this state park is often overshadowed by its more famous neighbor.

A unique collection of drawings that represent Fremont Native American culture.

This balancing rock is one of Utah's most unusual geological formations.