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

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

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

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

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.

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

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

A fitting attraction for the corn capital of the world.

Explore some of the most unique vehicles in history along with a cast of unsettling mannequins.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

A clear blue swimming hole with hidden caves, still unexplored.

The largest single concentration of harmless garter snakes in the world is a writhing Canadian serpent orgy.

Mysterious concrete spires left on a small Canadian hill.

This sky-high radio mast is formerly the tallest man-made structure in the world.

A true roadside icon standing on the same plains that the herds once roamed.

Mennes invented the tags we all place annually upon our license plates, and his story is told frankly and in full upon his headstone.

The world's largest Holstein cow.

One man's quest to save his town with a trail of record-breaking sculptures.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

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

Population: 1.

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