This rustic old building is said to be the most photographed barn in America.

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

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

A beautiful geyser under environmental threat.

An architect's childhood fantasy treehouse made real.

A mine in the Sierra Nevada that produced nothing but barren quartz.

California's first suspension bridge.

The oldest orange tree in California spawned a generation of citrus farmers.

The second seat of Nye County, still mostly a ghost town, has become a magnet for those looking to live "away from it all."

A difficult trail leads to interesting ruins in a remote canyon in the Toiyabe Range.

The only United States mine for magnesium carbonate has been operating continuously since the 1930s.

An errant donkey ushered in a new era of mining in Nevada.

The precious-metals strikes dating back to the 1860s are now mostly inactive, but this area has become the United States' only domestic source of lithium.

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

This trench, some 2,300 feet long, is only the most prominent relic of a largely forgotten episode of placer mining on the east slope of the Sierra Nevada.

A scenic hike in the High Sierra that ends at an old gold mine.

Deep vertical fissures like miniature slot canyons cut across the cemented volcanic rock of Black Point above Mono Lake.

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

A relic of the region's once booming timber industry.

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.

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.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

This ramshackle ghost town is comprised of mining-era buildings collected from around the region.

A ghost town originally established and governed solely by Black Americans seeking a place of their own, free from discrimination.