The Entrance to a Dilapidated Pyramid                  -      N      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      S      -

In the middle of the snow lies a worn-down pyramid of great interest. 
Almost completely covered with icy white flakes, this pyramid, although
huge, is nearly invisible from travelers at first glance.  The entrance is
surprisingly warm, and as you get closer a strange glow appears to emit from
the inside, beckoning you to enter and take a closer look.  To the north you
can barely make out a hallway that disappears into darkness.  What
mysteries, even treasures, could be found here?