This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

A museum celebrating the self-taught artist-environment builder.

This pebble beach is so beautiful that taking its rocks is against the law.

The oldest continuously-operating tavern in Wisconsin used a clever loophole to serve alcohol during Prohibition.

The remnants of this Douglas fir predate Columbus's arrival in North America.

This solitary gravestone is separated from the rest in Appleton, explaining why local legends continue to surround it.

The center of the only hemisphere that awards visitors with a commemorative coin.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

A stone marker memorializes the spot where the King broke up a street fight with a classic karate stance.

The home of 1.5 million wood letters for printing is still a functioning workshop.

The preserved remains of the former Milwaukee County Hospital for the Insane are hidden in the wooded grounds of County Park.

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

One of Frank Lloyd Wright's final works was this UFO church.