One thing which bothers me about ASOIAF/GOT is the height of the Wall and the fact that people have been able to cross over it. Not just stone-age Wildlings but that the (supposedly under-manned and under-funded) Night’s Watch were not only able to get to the top of the Wall but actually place defences on the top! The Wall is actually so high that people would get blown off by the wind on a regular basis! It is established in the books that the Wall (which is 700 feet high and 300 miles long) protects itself, so perhaps this is more of a plot hole. OK, so let's imagine that the Wall is, actually (more like) 300 feet high and 150 miles long, while some parts of it have fallen down. At these parts the Night's Watch have their fortifications. Specifically Castle Black, Mole's Fort which basically contains a trebuchet and Eastwatch, where the Wall is a consistent 200 feet high and extends 60 feet into the Narrow Sea There are a number of abandoned castles on the W...