One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

Sniff the Titan Arum's rotting flesh.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The factory for the popular Dumbo location, the Greenpoint shop is a quiet gem.

The inventor of the Coney Island hot dog rests in a grand mausoleum in Brooklyn.

In the back of a nondescript sports bar is a museum-worthy mural by legendary cartoonists.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

More than 250 sakes are available in an izakaya hidden in the basement of a Midtown office building.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

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

Washington D.C.'s most famous pianist, composer, and bandleader still tickles the ivories outside Howard Theater.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

A replica of the famous memorial statue at the Normandy American Cemetery hides in an office building in downtown D.C.

This taxidermy horse was a Civil War hero.

This grisly headstone doesn’t seem to be resting in peace.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

More than 500 unique and specially designed cases collected by D.C.'s "Harmonica Case Man."

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.