Martha's Vineyard is an island located south of Cape Cod in Massachusetts, known for being an affluent summer colony. It includes the smaller Chappaquiddick Island, which is usually connected to the larger island, though storms and hurricanes have been known to separate the two islands. The last such separation of the islands was in 2007, and as of April 2, 2015, the two islands are again connected.Often called just "The Vineyard", the island has a land area of 100sqmi. It is the 58th largest island in the United States and the third largest on the East Coast of the United States, after Long Island and Mount Desert Island. It is not connected to the mainland by a bridge or tunnel.The island is located in Massachusetts, as a part of Dukes County, which also includes Cuttyhunk, as well as the island of Nomans Land, the latter of which is currently a US Wildlife preserve closed to the public, due to possible unexploded ordnance dating from its role as a practice bombing range from 1943-1996. The Vineyard was also home to one of the earliest known deaf communities in the United States; consequently, a special sign language, Martha's Vineyard Sign Language (MVSL), developed on the island.