An impressive collection of farm equipment and other artifacts from life on the prairie.

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

A museum, walk-through diorama, and library nestled under one castle-like roof.

Known as "The Hill of the Little Devils."

One of the world's most definitive collections of musical instruments, spanning all cultures and historical periods.

Abandoned businesses, homes, and rusted cars are all that remains of this stopover town.

This geodesic gallery holds a collection of painted spheres that make traditional canvases look lazy by comparison.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

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.

A cemetery housing wild west legends in South Dakota.

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

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.

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

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

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

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.

Just a man taking his prehistoric pet for a stroll.

A cake-themed art installation tucked away in historic Chinatown.

A classically trained chef makes beloved burritos inside a gas station.

This "synagogue" is not what it seems to be.

Instead of hoofing it up steep stairs, residents can hitch a ride on this private lift.

"The greatest unknown literary treasure in Los Angeles."