OH! Ann, I know what you're talking about...we were not able to get a good picture either. It's really tough to get it through that glass.
Sharon, if you walk into the Disneyland Hotel with Goofy's Kitchen on your left & escalators ahead of you, the collage is going to be to your right (in the carpeted area). It's a bunch of glass cases on the wall.
Wait...okay, I'm thinking it out here...and you're more likely to enter with Goofy's Kitchen straight ahead, which would make the collage directly on the walls to your left.
LOL! Okay, whichever way you enter, you should be able to find it. (That is, if I didn't confuse the heck out of you.)