Fountain of Youth

Publisher's blurb:

A gigantic skull sits central on a platform of ancient stone and moss, four paths span the chasms that surround this skull one path however has broken over the ages and now a gap lies between. The dark and dreary forest blocks the light from above and produces a sickly smell of death.

Within the ancient skull lies a rounded well, a dark reddish liquid deathly still within. On the edge of the well lie bones of all sorts, but they mostly seem to be human.