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

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

A historic arena where the Beatles played their first concert in the U.S.

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

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

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

The most accurate timepiece in the world.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.