historic sankaty head lighthouse in siasconset, nantucket, massachusetts, usa

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