Huge Cave
=========

+-- Ground level -----------------------------------------------------------------------------------+
|                                                                                                   |
|                              M                                                                    |
|                               \                                                                   |
|                                \                                                                  |
|                                 *                                                                 |
|                                 |                                                                 |
|                                 |                                                                 |
|                                 *--*                                                              |
|                                  \                                                                |
|                                   \                                                               |
|   *                                *        *                                                     |
|   |                               /         |                                                     |
|   |                              /          |                                                     |
|  <*--*                          *           *                                                     |
|       \                        /           /                                                      |
|        \                      /           /                                                       |
|      *--*--*--*              *           *                                                        |
|                \            / \          |                                                        |
|                 \          /   \         |                                                        |
|                  *--*--*--*     *--%--*  *                    *--*     *              *           |
|                                    v   \ #                   /    \    |             / \          |
|                                         \|                  /      \   |            /   \         |
|                                          *--*        *--*--*        *--*--*--*#-*--*     *--*#-M  |
|                                          #   \      /              /   |          /            v  |
|                                          |    \    /              /    |         /                |
|                                          *     *--*              *     *        *                 |
|                                                                  |                                |
|                                                                  |                                |
|                                                                  *                                |
|                                                                 / \                               |
|                                                                /   \                              |
|                                                               *     *--M                          |
|                                                                     |                             |
|                                                                     |                             |
|                                                                     *                             |
|                                                                                                   |
+---------------------------------------------------------------------------------------------------+

+-- Level -1 ---------------------------------------------------------------------------------------+
|                                    ^                                                              |
|                                    %                                                              |
|                                   <                                                               |
|                                                                                                ^  |
|                                                                                                M  |
|                                                                                                   |
+---------------------------------------------------------------------------------------------------+