Honeymoon Island State Park is a Florida State Park located on Honeymoon Island, a barrier island across St. Joseph's Sound from Palm Harbor, Ozona, and Crystal Beach. The park is 385 acres (1.6 km²) in land area with 2,400 acres (10 km²) submerged and 4 miles (6 km) of beach. It lies at the western end of Causeway Boulevard, which becomes Curlew Road east of Alternate US 19. Its address is 1 Causeway Blvd. Consistently receiving more than one million visitors each year, it is the most-visited state park in Florida.