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

Before Nixon, "watergate" meant canals.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

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

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

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

Daily lunch spot for many of Washington, D.C.'s cab drivers.

A much-maligned monument to teetotalism.

Art deco landmark on the outskirts of Washington, D.C.

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

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The most accurate timepiece in the world.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

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

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

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

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

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

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