This geothermal hot spring hides beneath a slowly growing mineral dome.

The extensive collection of an amateur naturalist.

Largest collection of mounted dinosaur specimens in the world.

An entire town preserved as a historic landmark.

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

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

See just what life was like in a 19th-century prospecting town.

A small section of Boise, Idaho maintains the unique culture and traditions of the Basque people.

Jail from the 19th century that was built by inmates.

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

Home to the deepest rift anywhere on Earth.

One of the most remote spots in America and the first protected wilderness area in Nevada, named after an old legend.