A Lush Cavern                                          -      -      - 
(-------------------------------------------------)     W <---(M)---> E
                                                        -      S     SE

The caves in this section of the mountain are completely unlike anything
you've seen before.  Although the igneous rock walls make it quite obvious
that the chamber was formed by volcanic activity, the floor is covered with
a thin layer of soil and there are a variety of plants growing everywhere. 
There is a large tunnel leading to the west from here.