30 Rock is a big building, full of television production magic and mysteries. Walking through the building today, I came accross this sign on a door. I have no idea what is behind this door- what is in the "Imagination Room," but I do have two guesses.
It is either the Room of Requirement from Harry Potter, or the room with the chocolate waterfall from from Willy Wonka and the Chocolate Factory.
Your guesses?