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.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

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.

This hidden fire lookout offers spectacular views of Sequoia National Park.

Once a staging site for World War II munitions.

Thousands of acres of beautiful wild landscape in the Great Basin.

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

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.

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

A volcanic cone that formed over 600 years ago.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

This ''hidden'' 19th-century bridge played a simple, yet important role during the Spanish-American War.