We'd have Steinwehr Avenue.
I live in DC. Northern Virginia's idea of historic preservation is a sign in a mall parking lot ... and that's only if someone else pays for the sign.
Several other colonial mansions are preserved, even a Frank Loyd Wright usonian house. Then there's Bull Run Park (which protects the flanks of the Manassas Battlefield).
Arlington National Cemetery is in northern Virginia, as are Fort Belvoir and Fort Myer, the Pentagon, National Airport's main concourse building, ............