___
| 6 |
|___|
 _|_   ___
| 5 |_| 4 |
|___| |___|
       _^_
      | 3 |
      |___|
 ___   _^_
| 1 |_| 2 |
|___| |___|

 1 Inside waterfall (e,w)
 2 Hidden room (w,u)
 3 Stairway (d,u)
 4 Small room (d,w)
 5 Top of the fortress (n,e)
 6 Small room (s)