To fight the depressing darkness of wintertime, Microsoft has released a new beach-themed premium wallpaper pack you can download for free from the Microsoft Store.
Titled Aerial Beaches , the description of the high-quality wallpaper selection reads as follows:
Get a lofty view of waves meeting land in these 15 premium 4k images, free for Windows 10 Theme.
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 collection in the Microsoft Store here.