Large pictures of Sweden and its landscapes, architecture, etc. Just select the ones that have similar proportions to your monitor (4:3 if you have a normal monitor, 8:5 if you have widescreen).
That's a few pics taken by a friend when we went to Lappland, somewhere on the Torne river. Most of them have people on it, but there are a couple of truly amazing landscapes. Lappland rules the world of landscapes anyway 8)