Through a deep, narrow gorge with precipitous sides.
Below the falls the river rushes through a rocky gorge, and openings in the cliffs to the water are rare.
Up the gorge, there were no climbers tacked to the icy walls.
The living casemates were under the gorge parapet.
The basin is comparatively narrow, and the Tagus, like the other rivers of the Iberian tableland, generally flows in a rather confined valley, often at the bottom of a rocky gorge below the general level of the adjacent country.