https://wccftech.com/download-windows-10-wallpapers-4k-released-by-microsoft/

Microsoft has released two new Windows 10 theme packs this week. Titled "Wildflowers Premium," the first of these is available for free through Microsoft Store, and bring some extremely gorgeous 4K wallpapers all showcasing some brilliant shots of wildflower valleys. The theme description reads:

Take in the sweeping views of wildflower-filled valleys in these 18 breathtaking premium 4k images, free for Windows 10 Themes. These images are to be used as desktop wallpaper only.