Wall mounted corner shelf: I like the design and how it attracts the eye, but I picture this made with reclaimed pallet wood doubling or even tripling up planks that would give it more depth and character.
Mezzanines floor ideas are usually built to add some more areas for vital functions. It could be a bedroom, a working area, a library or others. Some even opt to have a mezzanine even if it doesn’t have a specified usage yet. The design of a mezzanine depends on how it will be used.