4K HD Wallpaper: High-Tech Architecture
Edifici Gas Natural also known as Torre Mare Nostrum, the skyscraper from Barcelona, Spain in a marvelous photography that is available under CC By license from courtesy of Tom Bech. Check the image at full size to see how cool it is an than download optimized for your screen device.
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)