We took a walk around Jones Point Park last weekend, once the southern tip of the District of Columbia’s boundaries when it still included Alexandria, VA. Ezra came along of course.
By the old lighthouse there still sits the District’s southernmost boundary marker stone, below ground level and darkly viewable under a glass shield.
Underside of the Woodrow Wilson Bridge also made for some interesting views, along with the archaeological display of a wooden rudder found on the Potomac River bed.
Jones Point is along the Mount Vernon Trail between DC and George Washington’s Mount Vernon estate. There are decent facilities if you need a nice place to bring kids near Old Town Alexandria.