Dark Grey Stone Tunnel (2)
==========================

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