Ok I know that there is a lot of negativity about RCT3, and after being a big RCT 1 & 2 fan, I havnt got into 3 as much myself, but these pool complex things are fun. Look at the one posted so far. I did one that was NOWHERE near that good (it was big though, it was for the first scenario.)
Heck i added a couple flats and then forgot about the rest of the park while I kept adding to the pool hehe.