The Great Salt Pond is a round and almost entirely enclosed body of water separating the north and south regions of Block Island. The pond has a small channel on its north west shore connecting it with Block Island Sound. The opening is artificial and was dug out in 1895 to make a harbor in the south part of the pond.
The shores of the pond have a long history of human use, as the area was one of the primary areas of residence by Native Americans both before and after contact with Europeans. Evidence of occupation dates as far back as the Middle Woodland Period, and includes the site of a palisaded fortification.