Sea fort – a fortified island at the entrance in Charleston port. Construction started in 1829 and was left unfinished on April 12, 1861, when the American Civil War started exactly here. A historical monument of major importance.

Location, GPS coordinates:	32.7524 N 79.8746 W
Categories:	Fortifications and defensive walls, Forts and fortresses
Values:	History, Architecture
Rating:
Where is located?	North America, United States, South Carolina, Charlestown, island fort at the entrance in Charlestown Harbor

Fort Sumter on the map