If at all interested in George R. R. Martin’s Game of Thrones (book or TV version), I heartily recommend this Rolling Stone interview.
I offer this small extract as worthy of note for us former residents of the North Britain.
Interviewer: How did you come up with the Wall?
George R. R. Martin: The Wall predates anything else. I can trace back the inspiration for that to 1981. I was in England visiting a friend, and as we approached the border of England and Scotland, we stopped to see Hadrian’s Wall. I stood up there and I tried to imagine what it was like to be a Roman legionary, standing on this wall, looking at these distant hills. It was a very profound feeling. For the Romans at that time, this was the end of civilization; it was the end of the world. We know that there were Scots beyond the hills, but they didn’t know that. It could have been any kind of monster. It was the sense of this barrier against dark forces – it planted something in me. But when you write fantasy, everything is bigger and more colorful, so I took the Wall and made it three times as long and 700 feet high, and made it out of ice.