A stoic rock cairn is all that remains to remember one of the more brutal instances of frontier treachery in American history.

This outsider art paradise is filled with dinosaur sculptures crafted from recycled machinery.

The notorious Wild West outlaw was raised in this unassuming abode.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

Dramatic river bend surrounds a natural red-rocked pedestal.

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

A cemetery housing wild west legends in South Dakota.

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.

A fitting attraction for the corn capital of the world.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

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

An artist-run shop filled with art inspired by and made from nature.

The largest self-built castle in the U.S., six decades in the making.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

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

A small town built on an abandoned airfield has former runways as streets and a bar and grill in an old airplane hangar.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

A B.Y.O.B. Mexican cantina lives inside one of the last tortilla factories in Brooklyn.