Wissahickon Valley Park
Forbidden Dr, Philadelphia, PA, Philadelphia, PA
100% positive
Directions: Help marker 440 (slightly north of Walnut Lane bridge) along Forbidden Drive Dropped Pin near Forbidden Dr, Philadelphia, PA 19119 https://goo.gl/maps/wVQsZJwGc3F2
Comments: Composting toilet and urinal; attracts flies (!) but relatively clean