Monet Water Lilies
Here's a cross stitch of one of the paintings from Monet's Water Lillies series. It's a large pattern, would take quite a while to stitch and makes use of 45 different thread patterns, but other than that I think it came out pretty nice looking.

Cross Stitch Pattern Preview:

Download Pattern. The cross stitch chart is 120 stitches wide by 120 stitches high.
Pattern courtesy of Cross Stitch Pattern