The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

Obscure Freemasons still live in D.C.’s largest private residence.

Decades before the scandal, this staircase on the river was a literal "water gate."

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

The oldest continuously operating fish market in the United States.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

When it opened during the final years of the embargo, all the drinks and cigars were free.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A historic neighborhood church is reborn as a psychedelic arts collective.

A wondrous old library overlooking the nation's capital.

This grand gothic brewery has been pumping out suds for over a hundred years.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.