In 1975, a forestry worker in Arizona claimed to have been abducted by a UFO.

One of the largest, oldest, darkest, quietest motel rooms in the world.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

A partial tunnel blasted into a steep ridge is all that remains of a failed railway across Arizona.

This Great Plains museum pays tribute to both the prosperity and tragedy of the North American fur trade.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

An entire city block built completely out of petrified wood.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

The first declared National Monument in the United States.

The oldest badlands in North America, Makoshika State Park takes it name from the Lakota words for broken land.

This museum is dedicated to telling the story of dinosaurs from a creationist perspective. 

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

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

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

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

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

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

This monument remembers one of the manliest men of the frontier who fought a grizzly before dragging himself 200 miles to safety.

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