Here is a collection of 107 wallpapers for your pleasure. Feel free to use them on any device you want. Each wallpaper is available as a 2048px high quality JPEG file. To download a photo click on it then on the options menu at the bottom.
Download the entire album
You can also download this album as a single zip file in which you will find the photos in their original size (up to 24 Mpixels.) Be warned, the zip file is 500 MB: http://goo.gl/CZ1DM
I hand picked these photos from my personal collection. In case you are interested, most of these images were taken with a Canon 30D, a Canon 5D Mk II and a Canon 5D Mk III.
This album includes the wallpapers I use on my laptop, Nexus 7 and Nexus 4.