This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

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

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

The formidable fowl can be found standing near an isolated hiking path.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

This cemetery is one of the last remaining traces of a drowned old Western town.

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

The old fire tower is one of the last of its kind in the United States.

One home in the historic strip hides secret compartments and the ghostly songs of long-gone canaries.

An antique Beechcraft airplane serves as a giant windsock for people driving through the blustery open country of eastern Wyoming.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

The oldest extant wooden jail in South Dakota and possibly the United States. 

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

Population: 1.

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

One man's ambition created this psychedelic log home.

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

An unusual geological feature towers over the remains of a dark episode in United States history.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

A mysterious "wedding cake" castle in the middle of the urban desert.

An open-air, roadside eatery celebrating a historic indigenous cuisine of complicated significance.

These petroglyphs created by ancient Arizonians have withstood centuries of exposure to the elements.

Once disputed as the largest sundial in the world.