The Cedar Key Light is located on Seahorse Key across the harbor from Cedar Key, Florida. Seahorse Key was the site a watchtower erected in 1801 by followers of William Augustus Bowles, self-designated Director General of the State of Muscogee, an attempt to set up an independent state in the western part of East Florida. The watchtower was destroyed by a Spanish naval force in 1802. Seahorse Key was used as a detention center for Seminoles captured in the Second Seminole War (1835–1842) before transfer to the West.