Life in the big city usually means life in a small apartment. It's fine while you're by yourself, but it gets complicated when it comes to giving visitors a place to stay. So if you find yourself lacking a guest suite, this transforming sofa bed called the Palazzo provides a double-decker spot for a couple of people to sleep.
Like with a traditional single-level sofa bed the Palazzo can be transformed by just one person. But when fully deployed you get an entire second story of sleeping space, including a ladder for easy access and a safety rail so the upstairs guest doesn't roll off onto the one below.
All your tiny apartment needs is some kind of similarly wonderful double-decker toilet to reduce bathroom demand, and you can probably turn it into a charming bed & breakfast. [Resource Furniture via Inhabitat]