The contiguous valley bore a great resemblance to that of Thingvalla; but the third one was again fearful. Lava covered it, and was quite overgrown with that whitish moss, which has a beautiful appearance when it only covers a portion of the lava, and when black masses rise above it, but which here presented a most monotonous aspect.
We also passed two grottoes which opened at our feet. At the entrance of one stood a pillar of rock supporting an immense slab of lava, which formed an awe-inspiring portal. I had unfortunately not known of the existence of these caves, and was consequently unprepared to visit them. Torches, at least, would have been requisite. But I subsequently heard that they were not at all deep, and contained nothing of interest.
In the course of the day we passed through valleys such as I had seen nowhere else in Iceland. Beautiful meadow-lawns, perfectly level, covered the country for miles. These rich valleys were, of course, tolerably well populated; we frequently passed three or four contiguous cottages, and saw horses, cows, and sheep grazing on these fields in considerable numbers.
The mountains which bounded these valleys on the left seemed to me very remarkable; they were partly brown, black, or dark blue, like the others; but the bulk of which they were composed I considered to be fine loam-soil layers, if I may trust my imperfect mineralogical knowledge. Some of these mountains were topped by large isolated lava rocks, real giants; and it seemed inexplicable to me how they could stand on the soft soil beneath.
In one of these valleys we passed a considerable lake, on and around which rose circling clouds of steam proceeding from hot springs, but of no great size. But after we had already travelled about twenty-five miles, we came to the most remarkable object I had ever met with; this was a river with a most peculiar bed.
This river-bed is broad and somewhat steep; it consists of lava strata, and is divided lengthwise in the middle by a cleft eighteen to twenty feet deep, and fifteen to eighteen feet broad, towards which the bubbling and surging waters rush, so that the sound is heard at some distance. A little wooden bridge, which stands in the middle of the stream, and over which the high waves constantly play, leads over the chasm. Any one not aware of the fact can hardly explain this appearance to himself, nor understand the noise and surging of the stream. The little bridge in the centre would be taken for the ruins of a fallen bridge, and the chasm is not seen from the shore, because the foaming waves overtop it. An indescribable fear would seize upon the traveller when he beheld the venturous guide ride into the stream, and was obliged to follow without pity or mercy.
The priest of Thingvalla had prepared me for the scene, and had advised me to walk over the bridge; but as the water at this season stood so high that the waves from both sides dashed two feet above the bridge, I could not descend from my horse, and was obliged to ride across.
The whole passage through the stream is so peculiar, that it must be seen, and can scarcely be described. The water gushes and plays on all sides with fearful force; it rushes into the chasm with impetuous violence, forms waterfalls on both sides, and breaks itself on the projecting rocks. Not far from the bridge the cleft terminates; and the whole breadth of the waters falls over rocks thirty to forty feet high. The nearer we approached the centre, the deeper, more violent, and impetuous grew the stream, and the more deafening was the noise. The horses became restless and shy; and when we came to the bridge, they began to tremble, they reared, they turned to all sides but the right one, and refused to obey the bridle. With infinite trouble we at last succeeded in bringing them across this dangerous place.
The valley which is traversed by this peculiar river is narrow, and quite enclosed by lava mountains and hills; the inanimate, silent nature around is perfectly adapted to imprint this scene for ever on the traveller’s memory.
This remarkable stream had been the last difficulty; and now we proceeded quietly and safely through the beautiful valleys till we approached the Geyser, which a projecting hillock enviously concealed from my anxiously curious gaze. At last this hillock was passed; and I saw the Geyser with its surrounding scenery, with its immense steam pillars, and the clouds and cloudlets rising from it. The hill was about two miles distant from the Geyser and the other hot springs. There they were, boiling and bubbling all around, and through the midst lay the road to the basin. Eighty paces from it we halted.