The lowest point in South Dakota and the source of the Minnesota River.

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

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.

This sculpture gallery is home to magnificent beasts made of scrap metal and found objects.

An entire city block built completely out of petrified wood.

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

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

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

The cliff and rock formations are made out of Sioux Quartzite.

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

Known as "The Hill of the Little Devils."

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

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

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

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

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

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

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

Chef Lawrence West serves up Indian tacos, wojapi, and other Lakota dishes at the brick-and-mortar incarnation of his popular food truck.

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

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

A ghost town now swarming with dozens of prairie dogs.

One of the first intercontinental ballistic missile sites in the United States.