Slap forehead time. Man, that is so well done, after all. The use of the tank gives a perspective that really made it difficult for most people to see Wally, and excellent DOF. In retrospect, this should have placed much higher.
Oh hey, I see him! He seems so small in relation to the other objects in the photo. And on seeing him, the tank looks enormous, but that can't be because the tank is in proportion with the leaves. That's quite a perspective. (for those who haven't found him, he is just above the tank toward the right side). Still don't know what that tank is about.
This is so weird. I looked at this image before and remember I definitely 'found' waldo, but on returning to it I am damned if I can find him again. Brilliant in that I am so sure I saw Waldo before but now you have me doubting myself. For that reason alone I think it meets the challenge very well and I am scoring it a 9 (lose one for the slightly blown out sky). The use of the canister is outstanding as it keeps drawing the eye, even though I know Waldo is not near it