4K HD Wallpaper: Sunlight. Train. Station
Stefan Kunze is the photographer and from his courtesy the image can be downloaded free under CC0 license and use in desktop backgrounds, homescreen phones, social media, content marketing, blogs, apps...
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 many tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many phones)