I lived in Coastal South Carolina for about 20 years. We used to take the boat up the Black River to just look around. They are still several old rice plantation homes intact there, well kept, as well as some ruins. You can only see them from the river. Also, a lot of the old levee system is still intact on the river from the rice planting era. Pretty cool. Most of the docks are long gone, but a lot the fancy brick steps going up the river bank toward the houses are still there. No doubt these bricks were made by hand and laid by slave labor. (In the rice planting era, the river was the road.) At the time, "Carolina Gold" rice was said to be the most popular rice in the world. I suppose the Union Army didn't burn these houses because either they didn't know about them, or they didn't want to trench thru swamps filled with snakes and gators to get to them.