8 Cony Street Castles & Fortifications Old Fort Western The oldest surviving wooden fort in New England. EXPLORE PLACE
45 Clinton Street Castles & Fortifications Fort Delaware State Park A Civil War prison fort on Pea Patch Island, reached by ferry from Delaware City. EXPLORE PLACE
2601 Atlantic Avenue Castles & Fortifications Fort Clinch State Park Fort Clinch is a well-preserved 19th-century brick fort at the mouth of the St. Marys River. EXPLORE PLACE
110 State Highway 180 West Castles & Fortifications Fort Morgan State Historic Site An 1830s brick fort at the mouth of Mobile Bay, site of the 1864 Battle of Mobile Bay. EXPLORE PLACE
12713 Fort Caroline Road Castles & Fortifications Fort Caroline National Memorial Fort Caroline National Memorial commemorates the 1564 French Huguenot colony. EXPLORE PLACE
Garden Key Castles & Fortifications Fort Jefferson, Dry Tortugas National Park A 19th-century coastal fort on Garden Key, 70 miles west of Key West. EXPLORE PLACE
601 Howard England Way Castles & Fortifications Fort Zachary Taylor Historic State Park Fort Zachary Taylor is a pre-Civil War fort and National Historic Landmark. EXPLORE PLACE
3501 South Roosevelt Boulevard Castles & Fortifications Fort East Martello Museum Fort East Martello is a Civil War-era fort turned museum, home of Robert the Doll. EXPLORE PLACE
1400 Fort Pickens Road Castles & Fortifications Fort Pickens Fort Pickens, completed in 1834, is a brick fort on Santa Rosa Island in Gulf Islands National Seashore. EXPLORE PLACE
6400 Hog Island Road Castles & Fortifications Fort Mifflin Fort Mifflin is a historic fort on the Delaware River, besieged during the American Revolution. EXPLORE PLACE
1350 State Route 155 Castles & Fortifications Fort de Chartres State Historic Site A reconstructed 18th-century French fort. EXPLORE PLACE
740 Fort Knox Road Castles & Fortifications Fort Knox State Historic Site A granite fort beside the Penobscot Narrows Observatory. EXPLORE PLACE
US Highway 80 East Castles & Fortifications Fort Pulaski National Monument A Civil War-era brick fort at the mouth of the Savannah River. EXPLORE PLACE
8635 A1A South Castles & Fortifications Fort Matanzas National Monument Fort Matanzas is a 1742 Spanish coquina watchtower fort reached by ferry. EXPLORE PLACE
1 South Castillo Drive Castles & Fortifications Castillo de San Marcos The Castillo de San Marcos, completed in 1695, is the oldest masonry fort in the continental United States. EXPLORE PLACE
148 Old Fort Road Castles & Fortifications San Marcos de Apalache Historic State Park San Marcos de Apalache Historic State Park preserves the site of Spanish, British and American forts at the junction of the Wakulla and St. Marks rivers. EXPLORE PLACE
3500 Pinellas Bayway South Castles & Fortifications Fort De Soto Park Fort De Soto Park preserves a Spanish-American War-era coastal fort with original mortars, plus a small history museum. EXPLORE PLACE
