เส้นทางศึกษาธรรมชาติ · Northwest Philadelphia · 4 คำแนะนำและคำวิจารณ์
Museum Without Walls: Follow the Wissahickon Creek Trail to the gorge south of Livezey Dam to find ‘Fingerspan’ by Jody Pinto. The functional sculpture was lowered carefully into place by helicopter in 1987.