The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

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

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

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

New fungal and bacterial species call this deadly lake home.

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

No Gordon Lightfoot song, only a barebones monument to greed.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

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

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

An entire city block built completely out of petrified wood.

The deserted railroad town had a last gasp as a ghost town attraction before being abandoned for good.

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

A cemetery housing wild west legends in South Dakota.

A fitting attraction for the corn capital of the world.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

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

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

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.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

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

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