Stash Cash in the Door? - 15 Secret Hiding Places That Will Fool Even the Smartest Burglar. you know until you put it all over the Internet and then everyone and their mother knows you have secret hiding places.
Hidden Gun Compartment Behind Sliding Wall Grate. Could also put grate on a piano hinge for easy opening. Good way to hide a weapon in a convenient, but overlooked location. Place them throughout the home. This is some Dexter shit!
Great idea for hiding guns in the house if you don't have a gun safe. Or even other items you want to keep safe! It took me a little while to understand this. The shelf unit slides behind a mirror. I thought it was a passage to a hidden room.