Apartment Therapy shows a really interesting bathroom design where a bench on an outer wall extends right through the glass into the walk-in shower. Another great and simple example of a shower with a bench (again from Carla Aston) makes use of wood material for both the bench and flooring. You may not have a ton of room for a full-sized bench, so a corner built-in might work instead. This one featured on Angie’s List looks great in this smaller shower! Another from BHG highlights the top of the bench with white.
You’re pretty lucky if you have a large enough window in your bathroom that could use a seating area right beneath it. A bathroom reno featured on Beneath My Heart uses an upholstered loveseat bench with added accent pillows for the window area. How about a built-in? This vanity featured on Home Bunch has a bench area near the window, while this other example (also from Home Bunch) creates a window seat out of a bathroom storage unit. You could also try a bathroom storage unit on a much larger scale with a bench as well, like the third option below from BHG. Built-ins are great, but they’re not for everyone. You could try a simple wicker bench with an elegant cushion to place by your bathroom window, like the one below featured on House of Turquoise.