Covered Canyon                                         -      -      - 
(-------------------------------------------------)     - <---(M)---> E
                                                        -      S      -

This appears to be the remains of a long unused mine.  Steep walls rise a
hundred feet or more, with a large patchwork of fabric strung across the
top.  This arrangement keeps all the rain and wind out of the canyon, making
it quite comfortable.  The canyon continues east and south.