They saw before them the bottom of a valley, or canyon, of about half a mile in length, and nearly a quarter of a mile in width; its floor, if one may use the expression, consisted chiefly of fine sand of a warm tawny hue; its sides, of rocks of white or pinkish white fine-grained sandstone, with here and there veins, two or three feet wide, of some metallic-looking material that glistened in the sunlight like masses of gold and silver. In other places were veins of jasper, porphyry, or some analogous rock, that sparkled and flashed as though embedded with diamonds; other parts again were dark-coloured, like black marble, throwing up in strong relief the ferns and flowers that grew in front of them.
At the further end of the valley a waterfall tumbled and foamed in the rays of the sun which, being now almost overhead, threw its beams along the whole length of the canyon. The stream that flowed below the fall widened out into clear pools here and there, fringed by stretches of velvety sward of a vivid green. The water of this stream was of a wonderful turquoise-blue tint, different from anything, Templemore thought, that he had ever seen before; and he and Elwood gazed with admiration at its inviting pellucid pools. But most extraordinary of all were the flowers that nearly everywhere were to be seen. In shape, in brilliancy of colouring, and in many other respects, they differed entirely from even the rare and wonderful orchids and other blossoms they had come across in the vicinity of Roraima. Of trees there were not many, though a few were dotted about here and there by the side of the river; and, in places, graceful palms grew out of the rocky slopes at the sides and leaned over, somewhat after the fashion of gigantic ferns. Though the valley was so shut in, and the heat in the sun very great, yet the amount of green vegetation on all sides, the blue water, and the light-coloured, cool-looking rocks, made up a scene that was gratefully refreshing after the gloom of the forest scenes to which the explorers had been so long accustomed. Moreover, by stepping back into the cool air of the cavern, they could look out upon it all without experiencing the drawback of the intense heat.