Great Swamp National Wildlife Refuge
…the Interior. Refuge lands lie within the townships of Chatham, Harding, and Long Hill. The Great Swamp is the remnant of the bottom of the once-mighty Glacial Lake Passaic that approximately 15,000 to 11,000 years ago stretched across 30 by 10 miles (48 by 16 km) in what is presently northern New Jersey. The lake was…