Being the proud owner of a new set of three 24" monitors, I needed a wallpaper big enough to cover them, and this is what I ended up with.
Triple head wallpaper-screenshot-2014-02-16-15-15-03.jpg

One more reason it's good to do maps in vector graphics. If you need ridiculously sized wallpaper, it's fairly easy to pull off.

The discontinuities are where I corrected for the bezel gap.