This bookcase built by Creative Home Engineering opens up to reveal a hidden gun vault. Helen "I would not be having a gun vault but love the hidden room idea. Would maybe fill it with my secret material buying purchases and canvas/paint 'must haves'!
Hide A Door - Secret Doors and Passageways I want this in our home, on the side of the house leading to a small underground tunnel with mini basement hide away and a secret entrance in the back yard behind bushes for an emergency escape route.
The hammock is a great idea so smaller "secret playroom" areas. This kid’s bookshelf opens to a secret reading nook. A SECRET READING NOOK. I would’ve never left. (from Everything About Secret Bookcase Doors)
Hidden doors -- This company makes cabinets, bookshelves and anything you can think of that fits your existing doorjambs thus hiding the door (and also making use of the space) Not sure I like the idea of a 'gun cabinet' door.