picturesque sankaty head lighthouse with stone marker in siasconset, nantucket, massachusetts, usa

massachusetts picturesque destination lighthouse siasconset navigation historical attraction beachfront background nantucket usamarker americana seafaring beautiful landscape undefined maritime nautical historic landmark building vacation atlantic outdoors sankaty sconset fresnel coastal america whaling history england holiday tourist outside erosion natural scenery marker island marine summer travel tourim nature scenic stone white sound coast guard tower watch ocean grass beach green light head cape lens trip