A Well Traveled Tunnel                                 -      N      - 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      S      -

In this well traveled tunnel, a collage of foot prints covers the floor. 
Claw prints, hoof prints, foot prints and more mark the floor going both
directions, it's impossible to distinquish what types of creatures are using
this tunnel due to the sheer volume of prints overlapping one another.  
A wandering soldier walks about on some errand or another.