I know that this could be asked in the photography threads, but I figured there are better FRA experts here. I'm going to be in FRA for a few days, and want to "plane spot". I know that there is an observation area in the terminal, but are there any other spots around the airport that give a great view? I noticed when I was there last week, a few people were lining the fence near the north/south runway with cameras in hand. Not sure if these places are easy to access.

Thanks!