Back in 1952, you could get a mushroom cloud chaser with your atomic cocktail.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

A terrific purveyor of natural history objects and curios.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

The oldest continuously operating fish market in the United States.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

Washington's iconic carousel has a nice piece of Civil Rights history.

The "lovely red Vega" of the legendary record-settling pilot.

A wondrous old library overlooking the nation's capital.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

During Prohibition, the U.S. Congress had an "official" bootlegger, with his own Capitol Hill office.

A much-maligned monument to teetotalism.

Home to a vast and influential collection of Shakespeareana.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.