Standing Before a Crumbling Tower                      -      -      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      S      -

The large structure before you was obviously built a long time ago. 
While it doesn't look like anyone has been maintaining the structure, it has
still held up remarkably well.  The stones of the outer walls are somewhat
cracked, but none of the walls have collapsed.  You can now see that the
source of the island's light can be found at the top of the tower, which is
streaked with an incredible amount of bird droppings.  Luckily the door to
the north is relatively clean.