A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

The tunnel under the Capitol Building where Congress takes out its trash.

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

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

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

Proto-CIA agents trained with grenades in the sand traps and fired machine guns from the fairways.

An eerie, decaying ghost town destined to fade into the forest.

Once America's tallest structure, now a Baltimore landmark.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.