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It is a wallpaper photograph of Yukama in the altitude of 2160m, and the Shirane-san crater. Shirane-san Yukama is a crater lake at the summit of the mountain in Kusatsu Shirane-san, and its tone of a light blue - emerald green is very impressive. However, contrary to that beauty, this Yukama is also a place which does not allow a life to come near. If it escapes from the Shirone volcano route, the Manza hot spring where a sulphuric bad smell drifts will be passed, and the national highway No. 292 line which goes to the Shirane-san summit still more will go up a steep slope gradually. If the parking lot of the rest house near the summit of the mountain is reached, the promenade which goes to Yukama from here still more will be gone up. Although it became ascent of about 50m in about 500m distance, when this had been gone up, the light-blue crater lake appeared suddenly at hand. It turns out clearly that hey, there are not a color of water without the flow of touch which stagnated, and complications, either, and Shirane-san is a volcano at that of the sulfur which attaches a nose contrary to the beautiful tone. the acidity of here Shirane-san Yukama is PH1 anything -- the world's No.1 -- it is said that it is a lake where acidity is high Is it, when it is incidentally called PH1 and is PH equivalent to a battery electrolysis solution? As for the area of Yukama, those with 300m and a depth of about 30m have 52600 sq m and a diameter. The circumference of the crater lake was surrounded by the brownish crater wall also without one grass, and shows beautiful contrast as empty blue or the light blue of a lake.
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