It is the volcanic rock through which the river has cut its way that gives the Grand Cañon its distinctive character. It is preëminently a cañon of color. The hue has no existence which can not be found there. "Hung up and let down and spread abroad are all the colors of the land, sea, and sky," says Talmage, without hyperbole. From the dark, forest-bordered brink, the sides descend for the most part with the natural slope of the loose rock, but frequently broken by vertical ledges and isolated pinnacles, which give a castellated and romantic air to the whole. Eagles build their nests here, and soar midway through the vast chasm, far below the beholder. The more prominent of the projecting ledges cause many turns in the general course of the cañon, and give numerous vantage places for sight-seeing. _Lookout Point_ is one of these, half a mile below the Lower Falls. _Inspiration Point_, some two miles farther down, is another. The gorgeous coloring of the cañon walls does not extend through its entire length of twenty miles. In the lower portion, the forests have crept well down to the water's edge. Still, it is every-where an extremely beautiful and impressive sight. Along the bottom of the cañon, numerous steam vents can be seen, one of which, it is said, exhibits geyseric action. In places, the cañon walls almost shut out the light of day from the extreme bottom. Lieutenant Doane, who made the dangerous descent several miles below the Falls, records that "it was about three o'clock P. M., and stars could be distinctly seen, so much of the sunlight was cut off from entering the chasm." The _Lower Fall_ of the Yellowstone must be placed in the front rank of similar phenomena. It carries not one-twentieth the water of Niagara, but Niagara is in no single part so beautiful. Its height is 310 feet. Its descent is very regular, slightly broken by a point of rock on the right bank. A third of the fall is hidden behind the vast cloud of spray which forever conceals the mad play of the waters beneath; but the mighty turmoil of that recess in the rocks may be judged from the deep-toned thunder which rises in ceaseless cadence and jars the air for miles around. [Illustration: _Terry Engr. Co._ _Haynes, Photo., St. Paul._ Lower Fall of the Yellowstone--from below.] [Illustration: _Terry Engr. Co._ Original Sketch.[BN] [BN] See foot-note, page 168.] To many visitors the stream far down in the bottom of the cañon is the crowning beauty of the whole scene. It is so distant that its rapid course is diminished to the gentlest movement, and its continuous roar to the subdued murmur of the pine forests. Its winding, hide-and-seek course, its dark surface when the shadows cover it, its bright limpid green under the play of the sunlight, its ever recurring foam-white patches, and particularly its display of life where all around is silent and motionless, make it a thing of entrancing beauty to all who behold it.