___   ___
| 2 |_| 1 |
|___| |___|
 _|_
| 3 |
|___|
     \ ___
      | 4 |
      |___|

 1 Giant lair (e,w)
 2 A giants' conference (s,e)
 3 A cleft in the rock walls (se,n)
 4 A dead end (nw)