Nature and natural things. Images may include "hand of man" as I feel that our personal experiences with nature rarely exclude "hand of man". You could argue that our being there means we are present and the fact that the image was recorded with a man-made camera implies hand of man in any picture. I'm not a purist in these things, but I do confess to appreciate it when I can be the only person there, and when there is no "hand of man" in an image. (Sorry about the "man" business ... it is just an expression).