The world-record holder for the longest bridge stretching continuously over water.

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

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The oldest continuously operating fish market in the United States.

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.

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

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

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.

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

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

Two small markers remember the Alamo's feline protectors.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A place to see how French aristocrats lived in the early 1900s.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

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

"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!”

When it comes to handsignals (and colonialism) rock always beats scissors.