You've come a long way baby...
Greetings Ghost Fans,
There was always one concept piece in the thousands for the Haunted Mansion that intrigued me. Marc Davis created an early rendition of the Corridor of Doors, not as we know it today, but as a large dark void filled with many doors in different stages of openness. Doorways to somewhere unknown. Of course, today its a regular hallway filled with doors that knock, clack and bend to the point of breaking.
On a related note, when the creators of the Haunted Mansion movie were researching for their scenes, they apparently came across this concept as well.
However, the scene was never shot, and the idea of the Corridor of Doors was saved until later in the movie when Sara Evers is running from Gracey. The door knockers in the hallway to her room all start clacking in unison as she runs. Which of course is interesting, as none of the doors even featured knockers.