Castine, ME

ZIP code 04420 belongs to Bucksport, Maine, a charming coastal town on the banks of the Penobscot River. One of the most notable landmarks in this area is Fort Knox State Historic Site, a well-preserved fort built in the mid-19th century to protect the river and nearby communities. Another prominent feature is the Penobscot Narrows Bridge, a modern cable-stayed bridge offering stunning views of the river and surrounding countryside.