This is the most celebrated cañon in the Park, and its colors make it one of the most gorgeously startling in the world. At bright noonday, it is adorned with all the hues of the sunset sky. Its precipitous walls are comparatively free from vegetation and are broken with pinnacles and jagged ridges. About fifteen hundred feet below the edge, the rushing waters of the Yellowstone River take on various shades of blue and green between accumulations of gray foam. Into the upper end of this cañon the river, about seventy feet wide, makes a sheer leap of three hundred and ten feet. From the near-by rim, this wonderful waterfall appears like an enormous, fluffy, endless pouring of whitest snowflakes. The magnificence and wildness of its setting combine to make it one of the most imposing waterfalls in the world. The paint-pots are the curiosities of the Park. They are craters, or irregular-shaped ponds, in the earth, filled with brightly colored mud, thick and hot, of fine texture, and in appearance resembling kalsomine or paint freshly mixed and colored. The mud in many pots is red or pink; that in others is lavender, blue, orange, or yellow. Occasionally a rugged vat of this mud is found boiling away--very suggestive of slaking lime. In other cases, plastic mud throbs and undulates as steam-jets now and then escape through it. Here and there this bright steamy mud opens like a full-blown lily. The paint-pots near the Fountain Geyser, those east of the road in Gibbon Meadows, and those close to the lake at the Thumb are the more attractive. [Illustration: GRAND CAÑON FROM ARTIST POINT YELLOWSTONE NATIONAL PARK _Copyright by Haynes, St. Paul_] John Muir, in "Our National Parks," says of the Yellowstone:--