This is cool, Philly gets a shout-out!
Denver’s Bluff Lake Nature Center may be situated beside an abandoned airfield, but the John Heinz National Wildlife Refuge’s neighbor, Philadelphia International Airport, is very much in use today. Still, Tinicum Marsh, Pennsylvania’s largest remaining freshwater tidal wetland, provides essential habitat for more than 300 bird species, almost one-quarter of which nest here. Established in 1972, the refuge continues to grow and will eventually reach 1,200 acres. Paddlers can tour a 4.5-mile section of Darby Creek, a perfect vantage point for spying elusive least bitterns, the state-endangered red-bellied turtle and the rare coastal leopard frog. Bird and flower walks, family programs and even story times occur every weekend.