clam bake!
They must have really like them to walk thousands of miles to get them.
I remember from my 5th grade social studies class that the Indians in the east relocated to the Atlantic coast for the winter as the snow shut down the interior woodlands to hunting. Archeologists know this from the enormous middens (representing centuries of use) found along creeks and streams a mile or so from the open ocean.
I wonder if that's the case with the Neanderthals.