You can't go anywhere on NarniaMUCK without stumbling over some clever mechanism.
In the course of working on something else I came across a place where you can't see the exits from the room. I wasn't sure what the deal was until I looked closer. Wixenstyx implemented a clever gadget that means your character must "learn" the area before you can see where the exits are--happily simulating the effect of your character learning the area and knowing the lay of the land.
Keep Exploring! Who knows what we'll discover next!