From Ann Radcliffe, The Mysteries of Udolpho (1794):
Towards the close of day, the road wound into a deep valley. Mountains, whose shaggy steeps appeared to be inaccessible, almost surrounded it. To the east, a vista opened, that exhibited the Apennines in their darkest horrors; and the long perspective of retiring summits, rising over each other, their ridges clothed with pines, exhibited a stronger image of grandeur, than any that Emily had yet seen. The sun had just sunk below the top of the mountains she was descending, whose long shadow stretched athwart the valley, but his sloping rays, shooting through an opening of the cliffs, touched with a yellow gleam the summits of the forest, that hung upon the opposite steeps, and streamed in full splendour upon the towers and battlements of a castle, that spread its extensive ramparts along the brow of a precipice above. The splendour of these illumined objects was heightened by the contrasted shade, which involved the valley below.
"There," said Montoni, speaking for the first time in several hours, "is Udolpho."
Emily gazed with melancholy awe upon the castle, which she understood to be Montoni's; for, though it was now lighted up by the setting sun, the gothic greatness of its features, and its mouldering walls of dark grey stone, rendered it a gloomy and sublime object. As she gazed, the light died away on its walls, leaving a melancholy purple tint, which spread deeper and deeper, as the thin vapour crept up the mountain, while the battlements above were still tipped with splendour. From those, too, the rays soon faded, and the whole edifice was invested with the solemn duskiness of evening. Silent, lonely, and sublime, it seemed to stand the sovereign of the scene, and to frown defiance on all, who dared to invade its solitary reign. As the twilight deepened, its features became more awful in obscurity, and Emily continued to gaze, till its clustering towers were alone seen, rising over the tops of the woods, beneath whose thick shade the carriages soon after began to ascend.
(Illustration is Karl Friedrich Hampe, Ritterburg im Mondschein, 1817.)