Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

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

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

A monument to the forgotten French explorers and their landmark expedition.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Mining caused an asbestos emergency in this small town.

A small Montana town commemorates the dog who waited at the train station every day for his owner to return.

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

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

See the computer’s history revealed over the course of 20,000 years.

This giant ice cream cone is the last remaining icon of a Salt Lake City staple.

This granite monument at the site of an ill-conceived tourist attraction is built from the same stone as the Mormon Temple.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.