This upper 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 wall 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.