World's second largest particle accelerator, where nature reveals its secrets.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

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

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 fitting attraction for the corn capital of the world.

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

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

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 first dinosaur parks gives a window into Depression-era paleontology.

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

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

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

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

A curious collection of miniatures in a quiet corner of the Chicago Children's Museum.

The house where John Wilkes Booth conspired with his co-conspirators.

Hidden on the 7th floor of a historic building, this Cajun spot features wall-to-wall bottles of hot sauce.

The palatial McDonald's that inspired Wesley Willis.

A display of magnificent stained glass windows is the first exhibit of its kind.

A century-old network of freight tunnels underneath the city's historic business district.

Designed by Alfred Caldwel, this landscape showcases his vision of a native garden.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

Location of the Real World's disastrous, and protested, eleventh season.