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

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

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

A wondrous old library overlooking the nation's capital.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

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

This bridge over D.C.'s Rock Creek Park is sometimes called the "Buffalo Bridge" because of its four buffalo sculptures, which were cast from a single piece of bronze.

This grand gothic brewery has been pumping out suds for over a hundred years.

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

A replica of the famous memorial statue at the Normandy American Cemetery hides in an office building in downtown D.C.

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

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

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

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

The oldest continuously operating fish market in the United States.

This eye-catching sculpture of rural life seems a bit out of place at a suburban intersection in front of a car dealership.

This local mascot has been a presence in the area since the 1960s.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

The narrowest house in America is seven feet of pure spite.