The summit of Krafla commands a most extensive view. Looking south-west, over the hills beneath, with their dirty splotches of whitish yellow sulphur, the country looked wintry indeed after the snow storm of the previous day, while the eye as it wandered southward caught a fine view-range over the Hliðarfjall and Dalfjall, as well as over the straggling lake of Mývatn, where the scenery widened out over the Mývatnsveit towards the snow-capped Seljalandsfjall, standing out like an island in the commencement of the dark stony sea of the Ódáðahraun. In another direction, between the snow-covered hills upon the east side of the Skjálfandifljót and the smoking Dyngjufjöll, the view extended over the pitiless waste of the Ódáðahraun to the snowy mound of Skjaldbreið, while the broad white expanse of the Vatna seemed to join the sky, till, almost wearied with the strain upon the visual power, it seemed quite a relief to turn to the nearer and happier-looking spots of green which the volcano and the glaciers have spared to Iceland.
Further to the east are the Bláfjall, where the Fremri-Námur deposits of sulphur are situated, and the fire-scorched hills of Trölladýngjur, whose position on the map Captain Burton has corrected, and the lordly Herðubreið, whose snowy cap looked all the purer for the recent snow storm. To the east and north-east stretched the plain of the Mývatns Örœfí, with its black patch of new lava enshrouded in a dim mist. Bearing N.N.E. was a tall column, apparently of steam, upon which the sun was shining; it was the spray from the Dettifoss, varying in shape as the wind acted on it, and reflecting rainbow colours in the sunlight. To the north the prospect was between the Hágaunguhnúkur (high-going hills) and Jónstindr, over a level country to the hills of Theistareykjafjall, where a third large deposit of sulphur occurs. It was seven P.M. before we returned to Reykjahlíð, and in a few hours we bade adieu to old Pètur and started along the eastern side of Lake Mývatn, accompanied by Paul and Arngrimur, for the little lake of Grœnavatn. The road was a bad one, over a continuation of lava streams which had flowed into the Lake of Mývatn, forming the curious little islands that spotted its sedgy waters. We put to flight several of the duck tribe, which were enjoying themselves after the manner of ducks upon the margin of the lake, and reached Grœnavatn at three A.M.; this was very slow work, but the nature of the ground prevented our travelling at anything beyond a walking pace for the greater part of the way. One of the principal features of this ride was the numerous gates which had to be opened and shut; these marked the termination of the various holdings, and also prevented the sheep belonging to the different homesteads upon the side of the lake from straying; for very often, where the gates were situated, the lava prevented the passage even of sheep by any other way.