Sandstone Cavern
================

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