Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

The only retired U.S. nuclear missile silo that is open to the public.

At the time of its completion, it was the tallest dam in the world.

A devilishly named gorge that was a sign of salvation for many pioneers.

No Gordon Lightfoot song, only a barebones monument to greed.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

A miraculous natural phenomenon known as "the spring that breathes."

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

An architect's childhood fantasy treehouse made real.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

One man's ambition created this psychedelic log home.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

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

A house carved into a rock in the 1940s.

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.

This Moab institution functions as both a rock store and a small natural history museum.

The fifth-longest natural arch in the world, and the longest outside China.

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

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

This unassuming layer of clay boasts an out-of-this-world origin story.