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John Heinz at Tinicum
National Wildlife Refuge | Pennsylvania

John Heinz National Wildlife Refuge at Tinicum is America’s First Urban Refuge and was established in 1972 for the purpose of preserving, restoring, and developing the natural area known as Tinicum Marsh, to promote environmental education, and to afford visitors an opportunity to study wildlife in its natural habitat.

The refuge is a green respite nestled within the urban setting of the city of Philadelphia. Refuge lands are a thriving sanctuary teeming with a rich diversity of fish, wildlife, and plants native to the Delaware Estuary. Healthy and productive expanses of freshwater tidal marsh, open waters, mudflats, and woodlands support the hundreds of species that breed, rear their young, rest during migration, or call the refuge home year-round.
http://www.fws.gov/refuge/John_Heinz/