4K HD Wallpaper: Mount Merapi · Marvelous Landscape from Nature in this Picture
Mount Merapi is located in Suroteleng, Central Java, Indonesia and this new landscape photography was took by talented japanese photographer - Kaneori Miura - and shared by his courtesy under Public Domain CC0 license. This type of nature wallpaper looks #wow in desktop / notebook screen, so if you'd like to test it choose from below links the optimal size - 4K, wide or HD. Yes, it's optimized for tablets and phones too, but in vertical screens the view isn't the same.
Let me know through a comment in feedback section if you like nature wallpapers and would like to see more like this one. Thanks!
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
High Definition HD 1080p: 1920x1080 (fits on: 1600x900, 1366x768, 1280x720)
Samsung Galaxy Tab & iPad: 2048x2048 (compatible with almost all tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many smartphones)