http://s1045.photobucket.com/albums/b455/MrStodern/Sotha%20Sil%20Expanded/?action=view¤t=ScreenShot15.jpg
In case you can't tell, you're actually surrounded by water, yet you're also not swimming in it. This is madness. No, this is Sotha Sil.
Only one of those doors will allow you to exit the manor. The rest just place you elsewhere inside the manor. For example, a door on a wall might have you coming out of another door set in the ceiling. You might even end up stuck in the water, and have no choice but to reload.
Unless the Clockmaker says no on that, in which case the doors are going to be rearranged to spell out "Trainwiz drinks his own wiz".
I kid, I kid.