My dream! "The Spiral Cellars design/build firm will dig a hole in whatever room you want your cellar in and haul the dirt right out the front door. In the remaining void they infill a spiral-staircase wine cellar.
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.