There is no mystery in this association of woods and otherworlds, for as anyone who has walked the woods knows, they are places of correspondence, of call and answer. Visual affinities of color, relief and texture abound. A fallen branch echoes the deltoid form of a streambed into which it has come to rest. Chrome yellow autumn elm leaves find their color rhyme in the eye-ring of the blackbird. Different aspects of the forest link unexpectedly with each other, and so it is that within the stories, different times and worlds can be joined. 

~ Robert Macfarlane, The Wild Places

Autumn Leaves – photo by Oleksandr75, bigstockphoto.com