How am I to describe a geyser? You walk on hot ground up to a low mound of white rock with a round hole in the middle of it. You look into the hole, and see, far below, bubbling water, with steam rising from it--very innocent apparently. Presently you are warned to stand back, and up comes the hot water, rushing through the geyser's throat, straight at first, then sloping outwards, and rising to any height from two feet to a hundred, in a beautiful spreading column of sparkling drops, curving over at the top like an ostrich feather; and round the water and above it steam rises in clouds. Some geysers play with absolute regularity, every four minutes or every half hour or at some other fixed time; others are more capricious, and play only once or twice a day, and at quite irregular intervals. I waited a whole afternoon hoping that the best of the Whaka geysers would play, and in the end it did, and up gushed the hot water to a height of forty feet or so--a magnificent display of sparkling diamonds. Most of these hot waters contain sulphur and other minerals, and bathing in them is an excellent cure for rheumatism, skin complaints and other ailments. In Rotorua you can even have a delightful bath of liquid mud, which is like grey cream mixed with oil, and makes one's skin feel as soft as silk.
The railroad ends at Rotorua. Beyond, you must either drive in coach or motor, ride on horseback, or go in a steam launch across the lake.
The country round is singularly desolate and almost uninhabited. Mile after mile the roads run between low hills covered with bracken and manuka scrub, with here and there some scanty tussock grass. Many thousands of pines, larches, gums and birches have been planted by prisoners who are kept in camps among the hills, and more trees are being planted all the time and are growing well; so, in a few years, the countryside will look less dreary.
Among the low undulating hills other solitary hills stand out, of strange forbidding shape, either flat-topped ridges or cones--most of them extinct volcanoes, or not quite extinct even now: as from some of them puffs of steam are always rising, not from the tops of the hills, but from cracks on the hillsides. In some places the scattered puffs are concentrated in great blowholes: you hear a mighty roar inside the hill, and from a narrow throat-hole a gigantic mass of steam comes pouring out perpetually--the safety-valve of some internal machine.