A funnel can be very obvious or not so obvious. It depends on the woods, the deer patterns, food sources, several things. An obvious example would be where there are several trails running through a section of woods and the woods becomes narrow. Instant funnel. It can also be less obvious say the woods is met by a curve of a stream or river or a road. It can me even less obvious if say suddenly the brushy woods has an opening or a lessening of the brush where the deer like to travel when put on alert. Extreme cliffs, drop offs, and all sort of things can funnel the deer. They like easy walking too. If not pressured they'll take the easy route, like a saddle in a ridge they cross to move from point A to B. It's not rocket science. Just look for anything that restricts travel or encourages travel in a particular direction, fences, roads, creeks, terrain features, field edges if a field sticks back into a woods. Heck, even a house in a narrow woods creates a funnel. Deer don't like walking up to your front door, they'll go around the yard. A stand that's been hunted too much by a lazy stinking hunter creates a funnel... they'll go around. The obvious are obvious. The great ones can be real subtle, like just a few more sapplings or brush. DOn't make it more difficult than it is. All you have to do is remember deer like to eat, avoid man for the most part and have favortie bedding areas and escape routes. Find places where they have to restrict themselves to accomplish or avoid that which they don't like. Look first for travel patterns, food sources, bedding areas etc and then find a place where deer coming from anywhere at one of these locations are bottlenecked and restricted. You'll just have more traffic there. Just think what a REAL funnel is. You pour something in a big open top and it comes out a restriction at the bottom. Pour the deer in a woods and look for the neck downs.