Acushnet Cedar Swamp is a swamp located in Bristol County, Massachusetts. It is managed by the Massachusetts Department of Environmental Protection. In 1972, Acushnet Cedar Swamp was designated as a National Natural Landmark by the National Park Service. The New Bedford Regional Airport borders the swamp to the south. One of the State's largest, wildest and most impenetrable swamps, and an outstanding example of the diversity of conditions and species in the glaciated section of the oak-chestnut forest. See also List of National Natural Landmarks in Massachusetts List of Massachusetts State Parks List of old growth forests in Massachusetts References Landforms of Bristol County, Massachusetts National Natural Landmarks in Massachusetts New Bedford, Massachusetts Protected areas of Bristol County, Massachusetts Tourist attractions in New Bedford, Massachusetts