Ancestral Cave
==============

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

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