Which is why, even though I hate/mourn some of the deaths and hate some of the chapters because hey! it's time to follow this character that I don't care about, I love George R.R Martin. While "main" characters may die in other books here and there, George Martin completely flipped the script so that you really don't know who is going to live or die (or stay dead)
Here's What Westeros Really Looks Like, According To George R.R. Martin
castle black at the wall - Hadrian's Wall served as Martin's inspiration for creating his famous Wall. The author said visiting the wall gave him a "profound feeling" that he wanted to bring to life in his fantasy work.