United by Blue’s Darby Creek Cleanup at John Heinz National Wildlife Refuge
John Heinz National Wildlife Refuge 8601 Lindbergh Blvd., Philadelphia, PA, United StatesNestled within Philadelphia's concrete jungle, John Heinz National Wildlife Refuge serves as an urban oasis and sanctuary protecting and preserving Darby Creek and surrounding Tinicum Marsh. Established in 1972 as America's first wildlife refuge, John Heinz NWR is home to...