An unusual slot canyon in the Aztec/Navajo Sandstone has a cross-section like an inverted old-fashioned keyhole.

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

This massive geographical sculpture is so subtle, it's possible to pass by it without noticing.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

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

This former Mormon settlement is reemerging from the receding waters of Lake Mead.

The most magnificent bottle house in a town strangely full of them.

A land of debatable treasure.

This small town was built around a marble quarry and named after one of the most famous sources of marble in the world.

A brothel nestled amongst ghost towns, with an abandoned plane wreck to greet you.

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

Under the right conditions, rocks will move across this dry lakebed, leaving trails behind them.

A rock that was too big to move, so the town just paved around it.

The quirky collection includes treasures like Elvis' underwear, Bob Barker's toothbrush, and hundreds of sock monkeys.

Some say that the battle fought at this Kansas site in 1856 was the first unofficial battle of the American Civil War.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

A rock maze opens up to a panoramic viewpoint at an abandoned mine full of ghost stories.

Nimrod Polar Expedition base, and home to hundred-year-old frozen whisky.

Fire meets ice at the southernmost volcano on Earth.

Towering basalt columns, a creation of fire and ice.

For decades, the largest tungsten producer in the U.S. was located in a spectacular setting in the high Sierra Nevada, with some of the workings over 11,000 feet.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

A small research station sits at the summit of this mountain, which is one of the few U.S. peaks higher than 14,000 feet outside of the Sierra Nevada.

The highest point in Montana is as rugged and singular as the state itself.