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

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

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

A beautiful geyser under environmental threat.

Modeled after a famous church in Vienna, Austria—but in Helena, Montana.

This tiny movie theater was the last one in the U.S. constructed in the Nuevo Deco architectural style.

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

The highest point in Montana is as rugged and singular as the state itself.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

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

An entire town preserved as a historic landmark.

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

Mining town from the late 1890s, once home to Calamity Jane.

This amazingly preserved Gold Rush town is a historian's dream.

New fungal and bacterial species call this deadly lake home.