Gay Head Cliffs
Chappaquiddick is at the Far East side of Martha'sVineyard and Aquinnah and Gay Head Cliffs are at the Far West. Here's some info on the area from Wikipedia.
Aquinnah has become celebrated as a center of Wampanoag culture and a center of pride and tradition among members of the federally recognized Wampanoag Tribe of Gay Head. They make up about one-third of the town's voters and are one of two federally recognized tribes of Wampanoag in Massachusetts. This area is one of the earliest sites of whaling. The Wampanoag harvested whales from small boats and shore, using harpoons, long before the 19th-century industry of whaling became the major maritime industry of Martha's Vineyard, Nantucket, and New Bedford, Massachusetts.