The general idea behind this pinboard is to find architecture that is simple, modern, and still tied to nature. Appropriately, here's a house by TSC Architects (actually in Hinomiya, Japan).
The main part of a bathroom is of course the bathtub. there can be beautiful bathtubs made of copper, stone and even out of wood.
Wooden Floors Wooden Nuances Defining the House in Nagasaki, Japan - DOOR