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.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

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

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

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

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

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

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

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

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

These headstones and a few stone foundations are all that remain of a once-booming mining town.

A shady solar power system that couldn't hold up to the harsh desert conditions.

The remains of this early 20th century refinery loom on a mountainside like a graffiti-covered fortress.

A museum in rural Utah documents the history of the Japanese Americans who were forcibly relocated there.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

This lava formation earned its whimsical name from the log-like formation of it stones.

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

This set of three large, volcanic hot springs is a favorite haunt for intrepid divers.

Oddly shaped rock formation, misassociated with a nearby utopian community.

This ghost town was once a cult-like religious utopian settlement.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.