Inside Natural History Museum in London
If you ever visit London it's "mandatory" to visit Natural History Museum (Official Website). This is the 3rd image from the Natural History Museum and was took by English photographer - Joshua K. Jackson - and shared from his courtesy under CC0 license. So check the image at full size and if you like it's available for download optimized for fit perfectly in phones and desktop backgrounds or maybe for other projects (blogs, apps...) that you might have.
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
Samsung Galaxy Tab & iPad: 2048x2048 (compatible with many tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many phones)