Built-in window seats and benches provide extra storage and seating, and can visually enlarge and add interest to windows and under-utilized spaces.
Modern, floating cabinetry.
Maximizing space in an East Village studio with a loft and secret stair storage.
Nooks and corners are underutilized spaces that can be great for tucking away small desks or benches. I especially like the bench that tucks away in the second picture.