4K HD Wallpaper: Keep Exploring
Justin Luebke is the photographer behind this great photo message and from his courtesy the photography is shared under CC0 license. The motivational image it's optimized here for fit perfectly in desktop backgrounds, homescreen phones or maybe you'll wish to use it in other projects such as blog articles, web design, social media, 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)