A Brook
You decide to go left, toward the sound of running water. You walk through a large patch of forest that is so thick with trees that nothing is growing on the ground. After a little while, the trees clear a bit and you come upon a tiny brook. Seeing no better option, you decide to follow it. After you have walked awhile, you see a little bridge leading across to the other side of the brook.
Cross the brook and see what is on the other side