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

Known as "The Hill of the Little Devils."

Every president in history is immortalized in bronze in downtown Rapid City.

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."

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

One of America's first dinosaur parks gives a window into Depression-era paleontology.

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

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.

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.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

This massive roadside mascot was the first version of the giant to illustrate his butt.

A winged-helmed, sword-brandishing tribute to German Americans.

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

Elaborate drama imparts an appreciation for 19th century hardships.

A fitting attraction for the corn capital of the world.

This Wild West attraction is alive with glitching automatons.

One devoted couple has donated multiple recreations of Michelangelo's sculptures to this South Dakota town.

A town honors its legacy of traditional American Indian pipe carving with one gigantic pipe.

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