Castine, ME

ZIP code 04420 is located in Bucksport, Maine. This area is home to significant landmarks including the Penobscot Narrows Bridge and Observatory, which offers panoramic views of the Penobscot River. Another notable feature is Fort Knox State Historic Site, a well-preserved fort dating back to the 19th century. The charming town of Bucksport also offers a variety of shops, restaurants, and outdoor recreational opportunities for visitors and residents alike.