A Cavernous Entrance                                   -      N      - 
(-------------------------------------------------)     - <---(M)---> -
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You stand just within the massive entrance of the cave.  From inside the
cave you hear loud noises of clanging, creatures chattering, beasts groaning,
and various other noises.  From what you have heard of this place while
chatting with the locals, it is infested with various beasts and monsters,
some docile, while others aggressive.  You also hear that the place is HUGE,
requiring several full days to explore.