Hi everyone, new here.
I got all excited after beating Riddler (finally) and getting all the trophies, and I noticed the door you couldn't open in the processing plant.
I have been looking around on the net to see if you can open it, and no one has found a way, and many claim it can't be done.
However I have noticed something that hasn't been stated yet, I think...
If you look at the bottom of the door in detective mode you can see three round cables sticking into the door; just like the ones from any fuse, switch, or button. Also if you look to the left you can see the cable run up along side the door.
Now does this happen to all the locked doors, or is it just this one?
here's a picture