Would be great in the bathroom. I would place photos and rolled towels. Build a Wall Niche: Save space by mounting a simple cabinet inside a wall between wall studs. You can build and finish it in a day.
floating shelves in a nice rustic-y wood // DIY-Floating-Shelf-Tutorial - half bath on main floor could use some pretty storage space. Great for master bath.the problem solved for the space over bathtub.
Bathroom DIY Floating Shelves Note to self: to make removable - nail the trim and the top together first. Then slide it on to the support and counter sink some screws along the back and sides of the top board to screw into the supports