Gardiners Point Island is an island in Block Island Sound that was the former location of the Gardiner Island Lighthouse as well as Fort Tyler. For many years the island was connected via a shoal to Gardiners Island and as such it is under the jurisdiction of East Hampton (town), New York. In 1851 the federal government purchased on the peninsula from the Gardiners for $400 with the lighthouse first being lit in 1855 after a construction expenditure of $7,000. The lighthouse was in square, 1½ story brick building and had a sixth order Fresnel Lens, fixed white light above sea level.