4K HD Wallpaper: Rockefeller Center
The emblematic New York building - Rockefeller Center - captured in a super urban image by talented photograper - Anders Jilden and shared from his courtesy under CC0 license. This kind of architecture photos looks marvelous in homescreen phones. Of course it's also optimized for use in desktop backgrounds or in other projects that you might have.
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)