I thought those two first pictures were the actual map. But After scrolling down it does look really nice.
I couldn't exactly tell, but after seeing the very first two pictures I knew something was up. Kalphiter hosted a build exactly like this but with more detail a long time ago as a Creeper server, and you either stole the build or just remade it.
Might want to speak to WhoooMan, because it looks exactly like a simplified version of Kalphiter's.