An Underground Glacier                                 -      N     NE 
(-------------------------------------------------)     - <---(M)---> E
                                                        -      S     SE

Strange visions fill your eyes as you scan the glacial horizon.  All that
can be seen is the darkness of the cave, and the soft blue-white glow of the
permafrost glacier.  Once, this huge glacier was on the surface, but somehow
has been buried deep in the ground long ago.  Only the slow melting of the
glacier has walking on here possible.  The scene is the same all around you,
a dark ceiling, and a white floor.  Making navigation somewhat difficult.