I was searching for the POI in Lake Desolann in the Iron Marches today. I swam around for almost an hour unsuccessful in my attempt to find this underwater entrance to the cavern.
I finally asked one of my guild mates if they had found it yet and if they could tell me exactly what I was missing. It seems the rock texture over the entrance covers it completely and you have to swim through the side of the rock in order to get into the cavern.
I think that is a environmental texture bug that needs to be fixed. Had I not been told about that particular issue, I would never have found the entrance to this cavern.
I remember about two years ago when I brought my ranger through here that there was a discernable opening into the cavern visible once you got close to the bottom of that wall, but it appears to have bugged out so that it is not visible any longer.
