The area around Penobscot Bay is home to some wonderful natural areas. Holbrook Island Sanctuary State Park, just across the bay from Castine, is a beautifully protected natural area and is home to some great hiking trails.  The Summit Trail leads you up a short hill that overlooks Castine Harbor and Penobscot Bay, while the Iceworks Trail takes you out to a gorgeous fresh water pond seen in the photo.  During your visit take the time to enjoy a picnic lunch at the sand beach at the end of Indian Bar Rd.  We're lucky to have such a beautiful state park so close!