Every House Should Have a Secret Hidden Exterior DoorCasey Chan1/25/13 8:00pm8EditPromoteGo to permalink There's something about secret doors that makes my spine tingle. The excitement! The mystery! But most secret doors are on the inside of a house—pull that book to reveal a hidden chamber! push that wall through!—this one, amazingly, is on the outside. It's so good you don't even see it.