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

The longest living non-clonal organisms on Earth.

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

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

Stroll through a wonderland of stupendous moss-covered trees.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

Rustic natural hot springs in the deciduous rain forest.

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

This airstrip atoll is uninhabited by humans, but absolutely full of birds.

One of the last free public hot springs is decorated with hippie art.

A stranded woman lived alone on this remote island for 18 years, inspiring the great children's novel "Island of the Blue Dolphins."