Many androids are standing near the Escher's Waterfall. Unlike the original image, there's mill-wheel with four paddles here.
Click on the image below to see it in original size.
Author's Flickr photostream http://www.flickr.com/photos/splitmetal/.
The image can be found at http://www.splitmetal.com/default3-93.asp or http://www.flickr.com/photos/splitmetal/1724708144/in/set-72157602605235565