One of the most picturesque and undeveloped areas along northeast Florida's historic coast is Fort Matanzas National Monument. Just 14 miles south of St. Augustine, this area offers pristine beaches, nature trails and wildlife viewing. A free ferry ride across Matanzas Inlet takes visitors to the fort. The 1700s Spanish-fortified watchtower is one of a kind, built of coquina, a natural substance made from sea shells and sand. Nearby, open-air seafood restaurants make this area a must-enjoy spot on A1A.