A rapidly disappearing glacier filled with extinct grasshoppers, perfectly preserved in the ice.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

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

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

The only retired U.S. nuclear missile silo that is open to the public.

A small Wyoming town is home to the state's oldest-operating soda fountain.

Population: 1.

This Wyoming town is fascinated by a particular mythical creature.

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

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

The first declared National Monument in the United States.

Despite monuments in other locations, this spot in a South Dakota field is recognized by the U.S. National Geodetic Survey as the center of the 50 states.

A cemetery housing wild west legends in South Dakota.

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.

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

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

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

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

Just a man taking his prehistoric pet for a stroll.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

A roadside collection of over-sized iron creations that are a bit more macabre than most.

This Wild West attraction is alive with glitching automatons.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.