RE: Newbie question....
A topo map is 1 way to try, and find some possible funnels. Look for 2 different hill elevations that come close to one another, example Hill ^ Hill. Where 2 lower elevation lines come close together. Other funnels like Wash mentioned can be anything that forces deer to travel through a small corridor. It could be a downed tree close to a creek bank, one of my favorite funnels ever hunted was a log road between 2 large ponds. The deer had to travel through the funnel or go all the way around a pond.