Okay I'm in some temple thing that the spirit in the spring told me to go to after restoring light to the first area. Now I'm in a area with small 'islands of land connected by bridges etc. I have to get past a stone with a spiral on it but it's chained and needs a key. So I cross a nearby bridge and there are 4 wooden towers with propeller like objects on top. These towers are connected by an inverted Z shape. I obviously have to get the 'propellers' to turn to open the gate inhead but how? I tried hitting them with the catapult but it didn't work.