A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

A nostalgic bibliographic gem.

Home to items never before seen by the public.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

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

A jaw-dropping brutalist space church seems to have crash-landed in the middle of America.

The first hand-illuminated, hand-written bible since the invention of the printing press.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

The only arched bridge made of stone on the entire Mississippi River.

When flour explodes, it's not a pretty sight.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

The Midwest's reigning king of surplus stores is full of nothing you need and everything you want.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...