wacky castle house

Originally uploaded by inkblurt.

Last time I visited my folks, on my drive between their place up around Canton, GA, and the Atlanta airport, I ran across this strange castle-like house, tucked in the midst of semi-rural suburbs.
I’m dying to know what the heck this thing is.
It appears to have a moat around it, because in the front there’s a railing that looks like it goes into a pool (from my vantage point outside the gate, it was hard to tell).
Out back, it has a weird little smaller castle house like a pool house, maybe? And some creepy cartoonish character sculptures.
It must not be a very new house, because it has a gigantic TV antenna sprouting from one of the conical roofs. (I forgot the word for those things.)
There are a few more pics in the flickr stream, linked from the picture.
(Edit: See the new info on the house in this post)