This 16-foot-diameter wooden coin has been standing in Iowa City since 2006.

The fastest mail service in the west is tracked and memorialized along this 1,400 mile trail.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

How did the 110-foot limestone statue cross the road?

A tall smoke stack and boarded-up buildings are all that's left of the pioneering plant.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

A piece of John the Baptist in the American heartland.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

This unconventional used book store was once in the news for the surprising act of burning books.

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

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

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

Remnants of a quarry company town still stand on the banks of the Wapsipinicon River.

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

This missionary's legacy looms large over the Upper Peninsula of Michigan—literally.

Large one-man sculpture park in Michigan.

A comedy troupe's collection of bizarre humor.

The menacing creature had a tremendous influence on the local culture before being exposed as a hoax.

A mysteriously dark cemetery monument fuels stories and legends galore.

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

This Italianate Villa-style castle is pretty to look at, just keep off the private property.