This is a picture from another world (maybe the future earth), where a new civilization is spreading around some big ancient towers. The people don't know, what the towers where used for, but they're fascinated by all the strange machines inside.
The picture was an actual landscape-study, but I got a bit carried away ;)
Drawn with normal pencil on sketching paper, almost destroyed by scanning and saved with the wonders of digital post-processing. It's amazing, what one can do with only black, white and hard brushes.