This pristine World War II airfield gives a comprehensive look at atomic development and aviation history.

Come for the speed, leave in love with the desert.

This former mining railroad is one of the best-preserved short lines in North America.

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

A whimsical, punny collection of "fence art" outside the tiny mountain town of Baker, Nevada.

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

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

This roadside stop between Goblin Valley is the perfect location to view some of the region's natural wonders.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

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

The unusual patterns in this rock formation result from two distinct modes of weathering.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

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

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

This quiet park's strange sedimentary spires were named after Kodak's color film.

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

A bust of the entertainer and politician sits in an alcove at the Palm Springs Airport.

A natural dome made of volcanic glass in Inyo National Forest.

The longest continuous lava tube in Oregon.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

Not your typical pet cemetery.

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

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.