Fort Pulaski National Monument, located in Chatham County, Georgia, lies along the Savannah River only a few miles from its junction with the Atlantic Ocean. With the exception of approximately 250 acres on Cockspur Island and 200 acres on McQueens Island, the 5,400-acre park consists primarily of tidal marshes and mud flats that are subject to twice-daily inundation of a six to ten-foot tide, the second-highest tidal range on the U.S. eastern seaboard. These two islands that make up the site were, before human intervention, primarily salt marshes. Maritime forests, scrubland, shorelines, and grassed areas created through stages of succession and human intervention create diverse ecosystems providing habitat for a wide range of wildlife.