Un-Eden

Frodo, Sam, and Gollum approach Mordor.

The remainder of that journey was a shadow of growing fear in which memory could find nothing to rest upon. For two more nights they struggled on through the weary pathless land. The air, as it seemed to them, grew harsh, and filled with a bitter reek that caught their breath and parched their mouths.

At last, on the fifth morning since they took the road with Gollum, they halted once more. Before them dark in the dawn the great mountains reached up to roofs of smoke and cloud. Out from their feet were flung huge buttresses and broken hills that were now at the nearest scarce a dozen miles away. Frodo looked round in horror. Dreadful as the Dead Marshes had been, and the arid moors of the Noman-lands, more loathsome far was the country that the crawling day now slowly unveiled to his shrinking eyes. Even to the Mere of Dead Faces some haggard phantom of green spring would come; but here neither spring nor summer would ever come again. Here nothing lived, not even the leprous growths that feed on rottenness. The gasping pools were choked with ash and crawling muds, sickly white and grey, as if the mountains had vomited the filth of their entrails upon the lands about. High mounds of crushed and powdered rock, great cones of earth fire-blasted and poison-stained, stood like an obscene graveyard in endless rows, slowly revealed in the reluctant light.

They had come to the desolation that lay before Mordor: the lasting monument to the dark labor of its slaves that should endure when all their purposes were made void; a land defiled, diseased beyond all healing--unless the Great Sea should enter in and wash it with oblivion. 'I feel sick,' said Sam. Frodo did not speak. 

--J. R. R. Tolkien, The Lord of the Rings, 'The Passage of the Marshes'