Communipaw Cove is part of the state nature preserve in the park and is one of the few remaining tidal salt marshes along the Hudson River estuary. The Interpretive Center, designed by architect Michael Graves, is part of the preserve. To the west lies the Interior Natural Area, which is off limits to the public and is being allowed through natural processes to recover from environmental abuse. The park is also the only state park in Essex, Hudson, and Bergen counties. Another section of the park is called Liberty Industrial Park.