Rippling sand dunes frozen in the Arizona rock.

An Iowa town celebrates its heritage with the tallest working Dutch windmill in North America.

The oldest university museum west of the Mississippi retains its 19th century feel.

The magazine keeps a perfectly groomed display garden for its photo shoots.

Millions of dollars worth of sculpture decorate this Iowa city center.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

An old town theater converted into a celebration of the hobo legacy.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

This zombie-themed restaurant stands out in the heart of corn country.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

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

This geodesic gallery holds a collection of painted spheres that make traditional canvases look lazy by comparison.

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

"...I guess that was your accomplice in the wood chipper?"

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

A cemetery housing wild west legends in South Dakota.

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.

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

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.

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

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