Beavertail State Park is a Rhode Island state park encompassing 153 acres (62 ha) at the southern end of Conanicut Island in Narragansett Bay. Its main attraction is the active Beavertail Lighthouse, the current tower of which dates from 1856. During World War II, the park area was part of Fort Burnside, one of several coastal fortifications designed to protect Narragansett Bay. The park includes acres of grassy fields and miles of shoreline which are used for sightseeing, hiking, picnicking and saltwater fishing.