The world's last remaining store of its kind.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

A trailblazing sovereign nation tucked in the American state of Wisconsin.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

A place to eat for on-the-run agents and espionage enthusiasts.

Statue dedicated to the star of an old television show.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

The headquarters of the prestigious World Food Prize celebrates the heroes in the fight against hunger, has no cafeteria.

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

A small burial plot formerly stranded in the middle of a road.

The notorious couple camped at this site after a bloody shootout with police.

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

A eclectic collection of military memorabilia.

A public fountain that spouts "health water" from a nearby spring.

Home of what was the largest hydraulic mine in the world, producing gold and the first diamonds in the U.S.

The first U.S. town to secede from the Union, only to vote themselves right back in.

I Street Bridge is the heaviest swinging center bridge in the United States.

Special tunnels built so that frogs won't be killed when crossing the highway.

The largest drain hole in the world.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

This historic California cemetery holds the bodies of veterans of both the Civil War and the Donner Party.

California's own majestic geyser is powered by a subterranean volcano.

The fossilized remains of ancient California redwoods.