54°08'N, 159°40'E, summit elevation 1560 m; Last Eruption 1804
It is a volcanic mountain range 3 km long with 3 craters on its crest. In its southern crater (the crater of Troitski), there is an unusual acid lake in the depth of 170m. The temperature in this opaque, sometimes turquoise sometimes green lake, ranges from +27°C to +42°C while the level of mineralization is equal to an average concentration of sulphate and hydrochloric acids. The size of the lake amazes: it is about half kilometer wide and is 140m deep. It is assumed that the acid lake developed quite recently. The hypothesis says that it was the result of eruption unnoticeable for people. Anyway, today Maly Semyachek is one of Kamchatka's natural wonders, and those who managed to reach its foot should climb to the edge of the crater. The view opening to your eyes is unforgettable: a 200 m gap of the crater, the smoking green lake, the wild play of colours on the walls inside. When the weather is clear and windy, you can descend into the crater. You can stay on the slate-black beach to enjoy a poisonous emerald surf and water-spouts araising over the lake's surface. The coastal breeze that causes cough will make you leave the abode of underground "spirits" soon.