Massive Cave
============

+-- Ground level -----------------------------------------------------------+
|                                                                           |
|      *                                *     *                             |
|       \                                \   /                              |
|        \                                \ /                               |
|         *     *    <*                    *                                |
|          \   /|                         /                                 |
|           \ / |                        /                                  |
|            *  *              *        *     *                             |
|               |             /          \   /                              |
|               |            /            \ /                               |
|               *--*> *     *              *                                |
|                \     \   / \              \                               |
|                 \     \ /   \              \        <                     |
|               *--*     *     *     *        *        *                    |
|                  |    /     / \   /         |>                            |
|                  |   /     /   \ /          |                             |
|                  *  *     *     *           *  *                          |
|                  | / \                      | /                           |
|                  |/   \                     |/                            |
|         *        *     *        *     *     *     *                       |
|        /        / \     >       |      \   /     /                        |
|     < /        /   \            |       \ /     /         <               |
|      *        *     *     *--*--*        *     *--*--*     *              |
|     / \              \   /                \   /|            \             |
|    /   \              \ /                  \ / |             \            |
|   *     *              *        *           *  *  M           *     M>    |
|                       /         |          /   |  |                       |
|                      /          |         /    |  |                       |
|                  *--*           *--*     *     *  *                       |
|                  |  |             / \   /       >/                        |
|                  |  |            /   \ /        /                         |
|           <*     *  *--*     *--*     *--*--*--*  *              * <*--*  |
|             \   /       \   /             \      /              /   |     |
|              \ /         \ /               \    /              /    |     |
|               *           *           *--*--*--*              *     *     |
|                            \                    \            / \   /      |
|                             \              <     \          /   \ /       |
|                  *     *     *              *     *        *     *        |
|                   \     \   /                \     \      /     / \       |
|                    \     \ /                  \     \    /     /   \      |
|                     *     *     *     *        *--*--*--*     *     *     |
|                      \   / \   /       >      /|         \                |
|                       \ /   \ /              / |          \               |
|                        *     *              *  *--*        *              |
|                       / \                  /                \             |
|                      /   \ >              /                  \            |
|                     *     *        *     *                    *           |
|                            \      /                            \          |
|                             \    /                              \         |
|                              *--*                                *        |
|                             /                                             |
|                            /                                              |
|                           *           *                                   |
|                          /           /                                    |
|                         /           /                                     |
|                        *           *                                      |
|                                   <                                       |
|                                                                           |
+---------------------------------------------------------------------------+