The Marble Faun, Volume II by Nathaniel Hawthorne

After wide wanderings through the valley, the two travellers directed their course towards its boundary of hills. Here, the natural scenery and men's modifications of it immediately took a different aspect from that of the fertile and smiling plain. Not unfrequently there was a convent on the hillside; or, on some insulated promontory, a mined castle, once the den of a robber chieftain, who was accustomed to dash down from his commanding height upon the road that wound below. For ages back, the old fortress had been flinging down its crumbling ramparts, stone by stone, towards the grimy village at its foot.

Their road wound onward among the hills, which rose steep and lofty from the scanty level space that lay between them. They continually thrust their great bulks before the wayfarers, as if grimly resolute to forbid their passage, or closed abruptly behind them, when they still dared to proceed. A gigantic hill would set its foot right down before them, and only at the last moment would grudgingly withdraw it, just far enough to let them creep towards another obstacle. Adown these rough heights were visible the dry tracks of many a mountain torrent that had lived a life too fierce and passionate to be a long one. Or, perhaps, a stream was yet hurrying shyly along the edge of a far wider bed of pebbles and shelving rock than it seemed to need, though not too wide for the swollen rage of which this shy rivulet was capable. A stone bridge bestrode it, the ponderous arches of which were upheld and rendered indestructible by the weight of the very stones that threatened to crush them down. Old Roman toil was perceptible in the foundations of that massive bridge; the first weight that it ever bore was that of an army of the Republic.