This lower cabinet fits into a right-angle corner of a room where two walls meet. The door is diagonal, compared to the other cabinetry, in order to access the storage inside.
A diagonal corner cabinet takes an area that could have been wasted into useable storage space. One of the more popular options for this cabinet is a Lazy Susan cabinet, which houses a turntable, allowing items in the back to come forward without straining to reach through to the corner. This is also used for Corner Sink Cabinets if the sink is in the corner of your kitchen.