When I was little we would ride sometimes up on the back of the seat just under the rear window. I know, really dumb but at night time it was fun to ride there and look up at the stars. :)
I had a few night time car trips like that. I have a few pics my parents tok of me sleeping behind the rear passener seat of our 66 VW Beetle on one of our summer road trips. We're brininging back some childhood memories here!