Thorny Path
===========

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