Piscataway Park

Piscataway Park, located southwest of downtown Washington, D.C., near Accokeek, Maryland, protects Marshall Hall the National Colonial Farm, and the Accokeek Creek Site. The park is located across the Potomac River from George Washington's Mount Vernon estate. Wikipedia*

On the C-SPAN Networks:
Piscataway Park has hosted 1 event in the C-SPAN Video Library; the first program was a 2016 Vignette.