A Damaged Section of Boardwalk                         -      N      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      S      -

This section of the boardwalk seems to have been damaged in some way.  A
large, ragged hole in the wooden planks looks to have been created recently,
and the waves lap through the space created.  Curiously, the edges of the
hole appear to be broken and turned upwards, indicating that whatever force
made the hole came from the sea below.