Eldon Hill

Good atmospheric day for it. Like a Streel.

Try "Streel of Urtah"

Your picture is exactly how I would imagine the edge of a Streel to look.

:-D

"So abrupt and narrow were these strange gorges that in each, the branches of the trees extending from either steep slope almost touched one another and closed the opening. Thus roofed over, the depths of the ravines could not be perceived. ... All about their edges the grass grew taller and no path seemed to approach them from any direction. As he stood gazing, the breeze stiffened for a moment, the cloud shadows on the plain rippled in long undulations and in the ravines the leaves of the topmost branches, barely rising above the surrounding grass, shook all together and were still.

.....

Now that he saw it at close quarters, the lip of the ravine looked even more sharp and precipitous than from a distance. There was indeed something sinister about this place, unhusbanded and yieldless in the midst of the abundant land all about. There was something strange, too, about the sound of the breeze in the leaves - an intermittent, deep moaning, like that of a winter wind in a huge chimney, but faint, as though far off."