Kourna houses with doors that lead to nothing

The houses that You can enter have doors inside even though from the outside there are no entrances..

Yeah, don't worry about that... It's really common, non-openable doors, uninteractable asuran stone gates that remain closed like in Sandswept Isles...All these stuffs are just generic since they don't have enough time or the envy or any other reason to not model what is behind them, so in most case, you will simply find a wall behind :). Also they are modeled houses but with a closed door. It's just a matter of illogical logic.

Behind one of those doors is a pot of gold, though! Hehehe... just kidding :)