(VA) (Sierra Club Potomac) Join us on a hike along a portion of the former boundary line between the nation’s capital and Virginia. Discover why this area was included in the Federal City and why it was retroceded to Virginia in 1846. See stones placed every mile along the boundary survey line in 1791; all except one on this hike are original stones. These are the first federal monuments in the nation’s capital. As an added bonus, we’ll see Old Town Alexandria decorated for the holidays.