Location from A Song of Ice and Fire by George R.R. Martin
A colossal barrier of ice and ancient magic stretching three hundred miles across the northern border of the Seven Kingdoms — seven hundred feet tall, eight thousand years old, built to keep out an enemy most people no longer believe exists.
The Wall is the oldest and most massive structure in the known world, and standing at its base is an experience that rewires something fundamental in the human mind — the sheer scale of it makes you feel geological rather than personal. The ice groans and shifts with temperature changes, producing sounds the brothers of the Night's Watch call 'the Wall singing.' In the deep of winter, the cold radiating from its surface can kill an exposed man in minutes. Brandon the Builder raised it eight thousand years ago after the Long Night, when the White Walkers nearly destroyed all life. The spells woven into its foundation are said to prevent the dead from crossing — and when the Night King's dragon brought a section down, it was the first breach in eight millennia. The Night's Watch garrisons it with a fraction of the men needed, their numbers dwindling as the realm forgets why the Wall was built. But the Wall remembers. The ice remembers.
A sheer cliff face of ice rising seven hundred feet above the frozen ground, stretching from the Gorge in the west to the Bay of Seals in the east. Its surface shimmers blue-white in sunlight and glows faintly under moonlight. Nineteen castles are built against its southern face, though only three remain manned. From the top, the haunted forest stretches north like a dark green sea into infinity.
Also known as: the Wall, the ice wall, Brandon's Wall