The crumbling structure is a rare surviving relic of the area's bygone mining industry.

Dance on a hand-hewn log floor padded with bouncy boxcar springs at a saloon built in 1883.

A popular rock that acted as a waymarker for American pioneers.

This rustic old building is said to be the most photographed barn in America.

This mining town boomed in the Atomic Age when uranium was gold, only to be abandoned when the industry collapsed.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

An architect's childhood fantasy treehouse made real.

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

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

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

One man's ambition created this psychedelic log home.

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.

The first declared National Monument in the United States.

The abandoned remnants of a little sanctuary for world peace that fell into disrepair.

Underneath downtown Lincoln resides a network of caves that was also the city's first brewery.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

Roaming bison and a spectacular view at the highest point in Nebraska.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

This erect, phallic geological spire wasn't always named so domestically.

An experimental, automotive replica of Stonehenge.

Two hula hoops appeared on the tree after a storm, and the collection kept growing.

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

The “American Gothic" artist's largest works hang in an Iowa State University library.