The Wall stretches for 300 miles and is approximately 700 feet tall, It is made of solid ice and stone, and can be seen for miles round. It appears grey or blue depending on the weather and time of day. The top is wide enough for a dozen mounted knights to ride abreast and it is thicker at the base. According to myth, there are old spells woven into it, to strengthen it and keep creatures of a magical nature such as the Others from passing it.
The Wall is straight from Castle Black to Eastwatch-by-the-sea, but runs like a snake between Castle Black and the Shadow Tower.
The Wall has no gates anywhere, simply a few tunnels cut through it that are secured by heavy iron bars and massive chains that must be unlocked.[5] They are sealed with ice and stone wherever castles have been abandoned or in times of danger.