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

This secret gem of a toy store houses a rideable carousel populated with fantasy animals.

The remains of a World War II munitions factory still haunt the fields of this Twin Cities suburb.

Admire the art and then buy a raccoon skull cleaned by flesh-eating beetles.

An unusual assortment of art, furniture, and other curiosities.

The basement bowling alley of this St. Paul dive bar is decorated with thousands of dollar bills.

The Real LegoLand.

This lab's maddening silence is good for business but bad for sanity.

A Perpetually Under construction Park.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

Secret hideaway for an alternative beach experience.

Explore the History & Technology of Electronic Communication

A brick-paved former section of the historic coast-to-coast highway.

A lifetime's accumulation of bric-a-brac and kitsch.

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

These experimental weapons brought World War II to Nebraska as well as 26 other U.S. states.

The largest collection of historical roller skates in the world.

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

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

This monument remembers one of the manliest men of the frontier who fought a grizzly before dragging himself 200 miles to safety.

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

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