The crumbling structure is a rare surviving relic of the area's bygone mining industry.

America's silhouette includes 100 square miles of wilderness jutting into Canada thanks to an old mapmaking error.

Inside this museum resides a boot fit for a giant.

20,000 pieces in a Frank Gehry-designed building.

The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

This giant fiberglass cod celebrates Madison's self-proclaimed status as the U.S. capital of lutefisk.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

Ever wanted to can Spam?

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

Lured here by the promise of tens of thousands in gold, Jesse James started a quintessentially American trend of robbing trains in-motion.

The World's Largest Bull.

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

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

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

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

The house where the famed outlaw was shot by a dirty coward is now a museum to the criminal's legacy.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

The largest collection of historical roller skates in the world.

In rural Iowa, an imported 19th-century windmill overlooks an unlikely enclave of Danish culture.

A number of gruesome unsolved murders have turned this simple home into a morbid tourist trap.

An obelisk commemorating Lincoln's role in connecting the coasts.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.