Funny Bits in Star Ocean 2 (318)

I bet you can't see the funny here. Well, there's a series of rooms that look pretty much like this one in Fienal, and in some of them there's something in the centre that blocks your character from walking through: I don't know what it is. Also, there's a door in this area that will never open, no matter what switches are pressed; it always nags me, and every time I play the game I want to know what's behind it.