Well, these beautiful photos have now been extracted from Google’s website. While not mentioned anywhere, it is possible that the photos were taken from the Pixel and Pixel XL’s rear shooter since they are of 12MP in size. Even if not, the photos are pretty beautiful and since a majority of them are of high-resolution, you can use them as your phone’s wallpaper.
You can go through the individual 41 images from the gallery above and download the ones you like. Alternatively, you can download all the 41 images at one go from here.