For the bathroom, you could build and install a floating mirror shelf like this one. It is a relatively easy project and you can follow along at the link to see how it was done.
Like the title suggests these box shelves are a series of boxes you can build using plywood. You can change the size or depth to suit your use. Follow along with the free plans at the link to build your own shelving unit.
These floating “u” shaped shelves are easy to build and perfect for displaying picture frames or collections. Follow along at the link for the free plans and instructions to build your own.
This floating desk looks like one solid block of wood but it has a hidden surprise. The front folds down to create extra storage space for your floating desk. Smart.
Floating shelves not only look awesome but can be customized to suit your space. The length and thickness can be modified as well as the finish.
This floating shelf has a hole in the top for a plant to sit in. The free step-by-step plans at the link will walk you through the building process. Remember you can adjust the length of this shelf to suit your space.
Build a chunky floating shelf, perfect for seasonal decorating. It is easy to build too. Bonus! Build it using these free instructions.
Building torsion box shelves will give the illusion of thick looking and strong workpieces, but keep the weight down. Follow along at the link to build your own floating shelves.
Add unexpected interest to your reading nook by building these open floating bookshelves. At the link you will find the free step-by-step instructions.
Seamless Floating Shelf DIY
Build a seamless floating shelf using the free woodworking plans at the link. Making the shelf seamless makes it look more like one solid piece of wood.