A surprising, but overlooked example of geology in the middle of the nation’s capital.

During Prohibition, the U.S. Congress had an "official" bootlegger, with his own Capitol Hill office.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

More than 500 unique and specially designed cases collected by D.C.'s "Harmonica Case Man."

The first memorial dedicated solely to the Black troops who fought for the Union.

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

The district's only illusionarium supports free writing programs for local students with every purchase.

They sort through millions of dollars worth of diplomatic gifts on behalf of the government.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

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

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

Art deco landmark on the outskirts of Washington, D.C.

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

There’s a special club house at the top for the bell ringers.

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

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

Go take a picture with the inventor of the daguerreotype photographic process.

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

Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

The towering figures were created from the cemetery's fallen old-growth trees.