Pennsylvania Coal Pile

"Then, again, in mountainous countries where the traveler is continually girdled by amphitheatrical heights; here and there from some luck point of view you will catch passing glimpses of the profiles of whales defined along the undulating ridges.  But you must be a thorough whaleman, to see these sights; and not only that, but if you return to such a sight again,  you must be sure to take exact intersecting latitude and longitude of your first stand-point, else so chance-like are such observations of the hills, that your precise, previous stand-point would require a laborious re-discovery..."

                                                                             -Herman Melville, Moby Dick