The Dutch graphic artist M.C. Escher was known for his mathematically inspired art. I know what your thinking, math and art don't go together, but actually they go together all the time. Escher did not have any mathematical training, but most of his math was done visually and by instinct. I guess he had some great instincts.
His work created some of the first optical illusions. He loved to draw stairs that went nowhere and water that flowed up. If he always tried to find a way to make you think about art.
Which one is your favorite? What is some of the unique and unusual things that you can find in these drawings?