And over and around all these cliffs and rocks crawl entangled tendrils and weeds. Trees grow there also, but the wind's power is so great that trees have to transform themselves into clinging vines, that they may get a firm hold on the steep precipices. The oaks creep along on the ground, while their foliage hangs over them like a low ceiling; and long-limbed beeches stand in the ravines like great leaf-tents.