Somehow you’ve gotten your dream home. The cabin in the mountains, penthouse downtown, castle nestled deep in the woods, nuclear bunker in the hills, or whatever. Whats the bit you’d add that might raise a brow from others? The fireman’s pole? The slide? The moat? The hidden room behind a bookshelf where you keep your stuffed animals?
An underground gymnasium. Not a dinky one. Moreso what you have in a high school. A whole bunker facility would be nice as well.