There are quite a few images that one can see when looking at the full moon depending on the season, the viewer's location and the time of night.
These images are only visible to the naked eye, as any magnification through telescope or binoculars destroys the illusion.






There are dozens of other figures that some can see including the Madonna and Child, the Crab and the Donkey.
Thanks to A Field Guide to the Stars and Planets by Donald H. Menzel, H.M. Co, 1979, p. 250–251 for much of the information presented here.