Trap Door Wine Cellar Design, this may not be in my new place but I sure as hell will be adding this into my dream home designs :D
secret door to an underground storm shelter/panic room/hid out in the kitchen island! Best secret passage ever! Definitely a dream home feature! (would also be good if someone broke into your house and you had to hide somewhere) Zombie apocalypse.
(Narnia or not. How awesome would this be as a kid!) Wardrobe Passage to Hidden Narnia-Themed Playroom. Secret rooms are the BEST!
HiddenPantry door from the kitchen
How to make a book on the bookshelf a secret Switch. - just in case we ever decide to build a secret room.
Armoire with a hidden door. This company has TONS of hidden passages and such.