The term cave hunting might be wrong but I mean fox, badger and racoondog hunting under ground with assistance of terrier or similar dog. We have some places here which really are small caves.

Picture is taken on Änäkäisen linja where two Finnish batallions ErP 12 and ErP 13 fight one week against Russian strengthened infantry regiment during Winter War. Kivivaara couple of kilometres east is the first place where Red army cross the border during Winter War.