Great Falls of the Potomac
Here is a simple plug for a spot to hike and picnic if you are near the District of Columbia. The Potomac River splits Virginia and Maryland, and a great falls crashes along for hundreds of yards. When I visited there with my family recently, I also saw kayakers playing in the froth, and climbers scaling the taller riverside crags. Do not expect much solitude, but visit expecting a unique spot close to the nation’s capitol.