AWWW YEAH
I know this one, I think. Wonderland has one, when you enter from that painting I believe. Olympus Coliseum as well, right in front of the entrance to the lobby. As for Traverse Town...I'm sure there's gotta be one there too. I just can't seem to recall the place in my mind...AH FOUND IT! At the sewers beneath Merlin's house XD. So the answer is D).