Ferries to Monhegan allow visitors to see the Monhegan Lighthouse. Lighthouse Cruises are also offered that include Marshall Point, Whitehead Island, Two Bush Light and Southern Island (Tenants Harbor) lighthouses. See website to buy tickets and to see dates and times. All excursions depart from Port Clyde (880 Port Clyde Rd, Port Clyde, ME 04855). 207-372-8848.