If Elizabeth Watts had been looking around the Australian caves, Prometheus might have been a different movie. I was actually quite amazed to find out about it yesterday but it's almost a well known image but unfortunately has usually been only a point of discussion for ancient alien enthusiasts
Just another note, that page which I've given a URL for has now been broken down into several pages linking from that page because really having a long page with all those different things to point out was getting too long and confusing and I felt that giving each picture and its own page helped.