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

Local lore holds that Butch Cassidy took an escape route through Red Canyon's sandstone hoodoos after an attempted murder.

Nature has shaped this drainage tunnel into the digestive tract of a mighty beast.

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

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

This famous Nevada gold mine, once a hotbed of Wild West shenanigans, is now open for tours.

The self-proclaimed gateway to the Extraterrestrial Highway.

If you want to take a peek at Area 51, this is legally as close as you're going to get.

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

This sun-scorched lakebed contains samples of half the natural elements known to humankind.

This impressive tunnel was dug entirely by hand over the course of 36 years.

Nationwide network of co-ownership underground catastrophe shelters.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

The set location for a 1987 cult classic draws international film buffs to the middle of the Mojave Desert.

A mining camp built around an unexpected occurrence of silver.

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

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

Despite its name, this route in southern Utah offers a heavenly day trip.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

This interpretive path lets you get up close and personal with dinosaur bones.

Stay in a luxury cabin or refurbished Airstream in this former mining camp-turned-retreat.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

This National Natural Landmark is one of the best examples of a “mass wasting” in the world.