Pirate Trunk Litter Box
If your cat can't be toilet trained and you don't like all the litter boxes out, then do a DIY and make a hidden litter box station. TIP: you will want a litter box on every level and a litter box for every cat. Don't make it a journey.
Top 10 Ways to Upgrade Your Dog’s Life
what a great way to not have the litter box sitting out! 27 great tutorials on how to hide the litter box from you and your house guests but not from your cats! everyone wins
27 Useful DIY Solutions For Hiding The Litter Box - Some of these I would not do personally, but they are cute anyway.