Large Wooden Passage
====================

+-- Level +1 ------------------+
|            ^                 |
|            M                 |
|            v                 |
|                              |
+------------------------------+

+-- Ground level --------------+
|                              |
|      *--*                    |
|         |                    |
|         |                    |
|         *                    |
|         |                    |
|         |                    |
|   *--*--*                    |
|   |     |                    |
|   |     |                    |
|   *     *           *--*--*  |
|   |                 |     |  |
|   |                 |     |  |
|   *--*--*           *     *  |
|       \  \          |     |  |
|        \  \^        |     |  |
|         *  %--*--*--*     *  |
|            |              |  |
|            |              |  |
|            *              *  |
|            |              |  |
|            |              |  |
|      *     *              *  |
|      |     |              |  |
|      |     |              |  |
|      *     *--*--*        *  |
|      |                    |  |
|      |                    |  |
|      *--*--*--*--*--*--*--*  |
|                              |
+------------------------------+