Microsoft has collaborated with National Geographic to bring Windows 10 users a new free premium 4K Wallpaper pack.
Titled National Geographic Antlers in Autumn, the description of the high-quality wallpaper selection reads as follows:
Gaze at moose, stags, and deer in the misty autumn light in these 12 premium 4k images, free for Windows 10 Themes.
After downloading the collection, go to Start > Settings > Personalization > Themes and click on the theme you prefer.
To apply and change to the most appropriate colour, based on the current wallpaper, go to Customize > Colors > Automatically select a primary colour from the background.
Find the free Windows Wallpaper in the Microsoft Store here.