check out this shot from above
It might not be an old god, since no old god will open up like that (HAHAHAha..hehe..) but it may very be something that will be very very important in the area.
Thoughts?
Edit: Here's a video in the same zone, with what seems to be large tentacles.
http://www.youtube.com/watch?v=A6QU0...ature=youtu.be