Hyannis is a village on the Cape Cod peninsula in Massachusetts. It?s known for beaches like wide Kalmus Park Beach and the private Kennedy Compound at nearby Hyannis Port. The John F. Kennedy Hyannis Museum chronicles the assassinated U.S. president?s family vacations through videos and photographs. At the harbor, the Cape Cod Maritime Museum has boat-building exhibits. Ferries connect Hyannis to Nantucket Island.