Hidden doors -- This company makes cabinets, bookshelves and anything you can think of that fits your existing doorjambs thus hiding the door (and also making use of the space) Not sure I like the idea of a 'gun cabinet' door.
Be Creative with Old Wine Bottles After you drink the wine, what the heck can you do with the wine bottles. Quite a lot, actually. And wine barrels make great DIY project too. Here are some DIY Wine bottle ideas; let us know which project you will try.
Stunning Dark Cherry Stained Wall Mounted Wine Rack with Shelves and Decorative Dark Bronze Metal Mesh, Wine and Liquor Shelf and Cabinet. I would switch it up a little by angling the wine bottles and adding a few more bottles. Also I more glass holder.