Shiva and Ganga in Varanasi
If you are curious about Shiva and his tiger skin, here is a story to read: Why Shiva Wears a Tiger Skin. Notice that in the image of Shiva, you can see Ganga on top of his head! You can read about that story here: The Descent of Ganga. You can also read about Ganga's vehicle, the Makara, at Wikipedia.