Viola Owlfeathers Harry-Potter-Kiste
with special thanks and recognition to Michael Young aka "roonwit" for his amazing work providing us with the files for the past door openings.
The Do Not Disturb sign has been removed 4 times and visitors were faced with puzzles to get to the secret behind the door.
Click on the door handle it opens to show a brick wall with a loose, sparking, electrical wire hanging. There are 5 bricks that are clickable, two in the upper left area, one in the space below the wire, and two in the area under the plaster. You needed to click on all five in a certain order to see behind the wall.