One of my favorite panning shots is featured in the He-Man season one episode "Song of Celice." Though unnamed in the actual episode this location is referred to in the script as the Plains of Perpetua, an area of Eternia mentioned in the Series Bible and numerous other Masters of the Universe canons. It is a beautifully painted panning shot, very mysterious looking, and I love how we can see the plains trail off into the distance. We only see the location once in the entire series, but personally I think it is so unforgettable, and was deserving of further appearances!
(click on the image to see it at full-size)