“Coastal dunes make up roughly one third of the Cape Cod National Seashore, covering approximately 8,500 acres from Chatham to Provincetown. Dunes predominate on barrier beach and spits, along the coastal margins of the Atlantic Ocean and Cape Cod Bay, and across the northern tip of the peninsula – an area known as the Province Lands.” – (https://www.nps.gov/caco/learn/nature/sand-dunes.htm)
