The first is really nice, but then you are staying with that part of the wall in all the four photos here, all taken with a lovely blue sky, in nice, sunny, Floridian weather, while after the first I was hoping to see different parts, different aspects, different outlooks (maybe, too) from/of the castle, but... it is only this one corner.
Don't you have any other? I am sure you do!
(By the way, I once was there myself, back in 1995, heehee. I haven't heard about the Castillo de San Marcos nor seen photos of it ever since. It is built from shells, very interesting building material).