Accepted answer i m unsure if this is the part you re talking about but if you look down you will see a large metal dwarven head piece with an ledge behind it that can be reached from the water.
Skyrim locked behind door.
Its a two patr door so the plate gets you in between the two so u can just run through that one.
Opposite the bed is a bookshelf the skill book can be found on the top shelf on the left hand side amongst other books.
A shrine of julianos can be found behind an adept locked door which can be unlocked with the fellglow keep key.
At the back of the closet is a locked door which seems to be covered in blood.
Activate the door and the disembodied voice of the whispering lady will begin talking to you.
The vampire ancient regarded the master locksmith with insane hungry eyes and flew at him in a frenzy.
Upon entering go to the right hand side of the room and climb the stairs go through the door and turn right.
Coming from fellglow keep dungeons a fallen shrine of talos can be found lying on a pile of rubble in the first room with the novice conjurer and apprentice storm mage.
In the center of honeystrand cave on the body of a dead bandit.
My bro got stuck inside and there is no way out so yeah.
Hold x on a wooden plate then when its floting in front of you run at the door.
Go to highmoon hall in morthal.
Bring extra plates to get out.
She reveals herself to be the daedric prince mephala and tells you that some of her power is locked behind the door and that she needs you to release it.