Stone Passage
=============

+-- Ground level -----+
|    >                |
|   *        *  *  *  |
|   |        #  #  |  |
|   |        |  |  |  |
|   *        *--*--M  |
|    \      /#  #  #  |
|     \    / |  |  |  |
|      *--*  *  *  *  |
|                  @  |
|                  |  |
|                  *  |
|                  v  |
|                     |
+---------------------+