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

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

America's first federal monument.

This pharmacist and his patient greet visitors to the National Community Pharmacists Association.

This cannon dating to 1755 has stood guard at this suburban intersection since 1915.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

At 207 feet, one of the world's longest continuous escalators.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

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

The oldest continuously operating fish market in the United States.

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

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

A line of blue paint marks the route of the inaugural parade.

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

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

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

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

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.