Jonathan Harker, the hero protagonist of Dracula by Bram Stoker, states that Count Dracula's castle is a "veritable prison" because every door in the vast castle, with a plenitude of doors, was "locked and bolted." Furthermore, the castle stood at the "edge of a terrible precipice," which is defined as a cliff with a nearly vertical face, of more than a thousand feet as could be judged by the sound of a stone tossed over the precipice. Additionally, the castle was located above an isolated forested region with nothing to be seen in any direction but the color of "green treetops" interspersed with rifts in the land and rivers coursing over the land. Jonathan finds that the only exits are the windows edging the precipice. Hence, he declares the castle a locked prison and himself a locked-in prisoner.