Spinnaker Island (Massachusetts)

In 1636 the Boston Board of Selectmen ordered that two town residents be given land in current day Winthrop, Massachusetts in exchange for them forgoing their rights to land on the island.

A pair of 16-inch guns were emplaced on the island and later fortified with reinforced concrete casemates just prior to World War II.

One of these fortifications is still visible under a condominium complex at the north end of the island, where it is currently used as parking space.

The missile launchers were located in what is now the Webb Memorial State Park, on the other side of Hingham Bay.

The missile site was deactivated in 1974 and the island was subsequently used by the Hull public school system.