As you say, any clock is going to have room behind it. The clip from Hugo actually reminds me more of the inside of Westminster Tower[1], though in the movie th

As you say, any clock is going to have room behind it. The clip from Hugo actually reminds me more of the inside of Westminster Tower[1], though in the movie they put the clockworks right behind the face instead of in a separate room. I'm not particularly convinced that it's a hidden room, per se; the article just says "a secret door" which could well mean a perfectly ordinary door that they haven't labeled. 1: https://commons.wikimedia.org/wiki/File:Rear_of_a_clock_face_-_geograph.org.uk_-_407777.jpg https://commons.wikimedia.org/wiki/File:Rear_of_a_clock_face...