A gobbler will pick out a spot that he can be seen by the ladies, it really can be "anywhere". I've seen them along ridge tops, old logging roads, in fields edges. Had two gobblers that had a ridge top picked out as a strut zone, after listening to them walk the ridge gobbling their heads off, I waited til they were on the other end, slipped up on top and picked off the bigger bird, the next Sat. I killed the second one doing the same thing.
To find them you can sometimes find the drag marks left by their winds as they strut in fileds or roads.