The Conduit Road Schoolhouse is one of the last one-room schoolhouses remaining in Washington, D.C.

A street in front of NASA's D.C. headquarters has been named in honor of the Black women who were essential to early spaceflight.

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

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

This fertility idol of questionable authenticity inspired an iconic Indiana Jones artifact.

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

An overlooked memorial honoring the local Washington residents who died in World War I.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

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

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

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

A clone of a cloned tree that was so important it allegedly had its own guards.

The most accurate timepiece in the world.

A super-sized promotional trick that is now a D.C. landmark.

A nostalgic bibliographic gem.

The national park was once a plantation estate.

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

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A wondrous old library overlooking the nation's capital.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.