Frozen Cavern
=============

+-- Ground level --------------------------------------------+
|                                                            |
|                                    *                       |
|                                   / \                      |
|                        ^         /   \                     |
|            *--*--*--*--*--*--*--*--*  *                    |
|           /                   \       |                    |
|          /                     \      |                    |
|        <*--*     *--*  *--*--*--*     *--*                 |
|         |\  \     \   /               | <                  |
|         | \  \     \ /                |                    |
|         *  *  *     *                 *              *     |
|         |  |  |                                     / \    |
|         |  |  |                              >     /   \   |
|   *     *  *  *     *  *  *--*--*--M        *--*--*     *  |
|    >    |  |  |     |\ |\ |\    |  @                    |  |
|         |  |  |     | \| \| \   |  ?                    |  |
|         *  *  *  *--*  *  *  *  *  %                    *  |
|         |  |  | /              /   v                    |  |
|         |  |  |/              /                         |  |
|         *  *  *     *--*--*--*                          *  |
|          \ |   \   /                                    |  |
|           \|    \ /                                     |  |
|            *--*  *                                      M  |
|                                                         v  |
|                                                            |
|      *                 *>                                  |
|       >                                                    |
|                                                            |
|               *                                            |
|                >                                           |
|                                                            |
+------------------------------------------------------------+

+-- Level -1 ------------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -2 ------------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -3 ------------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -4 ------------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -5 ------------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -6 ------------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -7 ------------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -8 ------------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -9 ------------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -10 -----------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -11 -----------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -12 -----------------------------------------------+
|                                                            |
|                                    %                       |
|                                    |v                      |
|                                    |^                      |
|                                    %                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -13 -----------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -14 -----------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -15 -----------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -16 -----------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -17 -----------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -18 -----------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -19 -----------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -20 -----------------------------------------------+
|                                    ^                       |
|                                    %                       |
|                                    v                       |
|                                                            |
+------------------------------------------------------------+

+-- Level -21 -----------------------------------------------+
|                                    ^                       |
|                                    %>                      |
|                                                            |
+------------------------------------------------------------+