This large garden vase urn has nothing to do with the seventh U.S. President—it was designed by one landscape designer to honor another landscape designer's contributions to the National Mall.

Helen Keller once broke ground on this historic center for the study of technologies to benefit the hearing impaired.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

This lovely pocket park is one of the most under appreciated in D.C.

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.

A brass and marble scale model of the solar system embedded in the concrete.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

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

This nine-story building is the oldest standing skyscraper in D.C.

The site of the climactic scene from the classic horror film is now a historic landmark.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

A small token of gratitude from freezing cold journalists who were given a warm haven while covering JFK's inauguration.

‘Bush the old fire dog died of poison July 5th, 1869. RIP.’

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

Outside the Department of Transportation, a collection of artifacts honors the history of how we get around.

This statue of one of baseball’s greatest pitchers looks like something out of a sci-fi horror movie.

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

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

After decades of neglect, a brutalist icon is getting new life as an eco-friendly hotel.