I have all of the 5 elements but I can not find the tower with the cirlce in it to perform the ritual - where is it? Also there is one redish color gate that I can not open that has stairs going up on the other side, it is near the bedroom with the secret door where you use the crank to open it. Is this the path to the tower? How do I open the gate? Thanks!

The secret room you found had 2 treasure chests and a chain on the wall. Pull the chain to open the bars.