Boing Boing 

20 secret doors and sneaky hiding places you can make yourself

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From entire rooms to pocket-sized items, anything can be hidden in plain sight. All it takes is some imagination – and the right tools. Here are 20 cool stash-hiding projects, from small hidden spaces inside of playing cards, books, and the outdoor siding of your house, to large areas masked by bookshelves, drawers and cabinetry.

Secret exterior door with remote control lock

Matt Richardson says: "I've seen plenty of secret doors on the interiors of houses, but never an secret exterior door."

(Via Boing Boing Community on G+)