Only entrance to Donnottar Castle (except for a small hidden postern gate), near Stonehaven, Scotland.
Pursuit And Persuasion
"...It was a long climb on a dirt track to a cobblestone lane of long shallow stairs cut toward the heart of the cliff between high stone walls, just wide enough for a horse.
Ben could almost hear the beat of hooves, ringing on the stones, sparks shooting from metal shoes, horses clattering up to the first arched door, men in armor, in kilts and cloaks, leading horses through, then left fast in front of four cannon ports facing the low door, inside the outside arch.
Ben walked slowly, wondering how much had changed since then in the minds of soldiers and shepherds, and what it had been like for the chatelaine and the shepherd's wife under siege on the edge of the earth."