In another thread, user “timelocks” asked about exiting a locked vault.
Here’s a weird one. The Bank of Spain includes a vault whose door appears to include locks and controls on both sides!


I can only assume that if you’re accidentally locked inside, you either need to know one or both combinations and how to operate the wheels, or you will be told over an intercom by somebody outside. I’ve never seen this before.
Note the apparent lack of time locks.
Another feature of the vault is that it can be flooded as a security measure if necessary. I assume they would not place paper securities in here, only gold and other waterproof items. Or, if they trust the door is watertight, close it then begin the flooding (assuming the water enters the area outside the vault proper).
See http://www.forocoches.com/foro/showthread.php?t=2132928 and http://jubiladito.blogspot.com/2010/06/camara-acorazada-del-banco-de-espana.html for a few more details. Run them through your favorite translator as needed (e.g. http://bing.com/translate)
A couple of other images:


I can’t tell who made the door. Mosler? Diebold?