At the risk of sending you into a site with such intriguing imagery you may never escape, I share this: http://ffffound.com/
It's the little thumbnail pictures that get you. You click on one thing, and invariable one of the thumbnails looks so enticing you have to click that.
I figured the click tree would die out after a while but it never did. The only way to leave was to shut down all tabs for that site.