Not much in Savannah SC, as it been defunct since around 1765, but Savannah, Georgia now that's a different thing entirely. You have Laurel Grove and Bonaventure Cemeteries, Forts Jackson (with some of the remains of the CSS Georgia), McAllister and Pulaski. There are also some Revolutionary War areas and if you are into WWII there is The 8th Air Force Museum in Pooler.