Apparently Disney has a lot of things built into the theme parks that a lot of people miss. For instance,Club 33. Did you know that there was an exclusive club right in the middle of the Magic Kingdom? Hidden in plane view.
Check out this list of other interesting tidbits about Disney here and here and here
FYI – in looking up this entry for Club 33… it seems the Club is in Disneyland (the California park) not in Magic Kingdom. :\