Well done picture. Lighting and focus is good. The only problem I have is that it seems as if you had this picture and you just decided to use it for the contest and didn't give much thought to actually setting it up. The reason I feel this way is because you have 3 people in your picture not 1. Therefore, in comparison to the pictures that were done with the theme in mind, I had to knock you down a little. Sorry, but good luck anyway.
I see potentially 3 people on the observation deck, one right above the bridge, and possibly one by the car up on the hill. Since I can only assume that you didn't bring that many people to hide, I wonder which one is the target. As for the photo itself, nice scene capture, but I think there's too much void either at the top or bottom - yes I know the rule of thirds, but the void doesn't really add anything..
This is a very crisp and sharp shot, good one. But which one is Waldo? One of the people standing on the right or is he hidden somewhere? There are so many hiding places so far away! Good luck.
Where and what is this a photo of? It is beautiful. So clean and clearly focused. Nice composition and well executed. Postcard shot. BUT personally I don't see it as a "hiding Waldo" photo. I see several people but don't see anyone especially hidden. I like it as a photo on it's own. Great photo, really great, but I don't really think it meets the challenge. But it's one I'd like to have as a postcard.
Very nice shot. the people aren't that well hidden and there are a few of them. I think the picture would be better without them anyway, cropping off the right side and straightening it a bit. Nice job!