I went through my landscape photos and picked the best hundred, then spent time enhancing each one to make a good background image at 4k resolution (3840×2160 pixels). I have shared them through this Google Photos album under the CC BY-NC-SA license so you can save your favorites. If you simply save the images to an album in your own Google Photos then you can set that as your “Screensaver” for any Google-connected TV or device. Enjoy!