GTM National Estuarine Research Reserve
Encompassing approximately 73,000 acres of salt marsh and mangrove tidal wetlands, oyster bars, estuarine lagoons, upland habitat and offshore seas. The GTM Research Reserve has three beach access parking lots, nine miles of upland hiking trails and two small boat launches located off A1A in South Ponte Vedra Beach, parking $3. The GTM Environmental Education Center is open daily 9 a.m. - 4 p.m. and closed state holidays. Admission $2 adults, $1 children age 10 - 17, under 17 free.