I came across this nice animation showing what the sky would look like from various cities if Earth had rings like Saturn:
http://www.youtube.com/watch?v=UT2sQ7KIQ-E
Just think of how profoundly different our history would have been with those in the sky. My first thought was that the old mariners' problem of determining longitude would never have existed - just look at the rings, night or day. It would be pretty obvious that the Earth was round (though that was figured out several centuries B.C.). I wonder how they would have been incorporated into religious mythologies.