An entire town preserved as a historic landmark.

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

A beautiful geyser under environmental threat.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

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 man's ambition created this psychedelic log home.

At the time of its completion, it was the tallest dam in the world.

Native Americans built this circle of stones, which was used to predict astronomical events.

Derelict buildings are all that remain of a complex at the site of one of the worst mining disasters in Montana history.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.