Home to a vast and influential collection of Shakespeareana.

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

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

There's an old indoor swimming pool hidden directly underneath the White House Press Briefing Room.

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

There just so happens to be a court even higher than the U.S Supreme Court: a basketball court in the building itself.

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!”

This forgotten boat elevator was an engineering marvel in its heyday.

Before Nixon, "watergate" meant canals.

100 years later, they're still down there.

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

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

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

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

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

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

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

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

The discovery site of the "Capitalsaurus," the official dinosaur of Washington, D.C.

Washington's iconic carousel has a nice piece of Civil Rights history.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.