Okay, I know this is a huge bathroom, but big bathrooms often offer ideas that work in smaller spaces too. The towel niche next to the shower here would work very well in a tiny bathroom, since towel bars normally protrude 4 inches from the wall and can prevent doors from opening all the way. This type of niche gives you extra storage without taking up space, and it frames the towels so they look neat and tidy, even when hanging on a hook.