The mud volcano on Sakhalin, similar to the surface of the Moon, is a kind of calling card of the island. In the 20th century, strong eruptions were recorded here — the height of emissions during explosions reached 50 meters. Now the craters are just quietly gurgling. The volcano is a giant mud field with many craters. The landscapes are fantastic! Take a closer look at the ground next to the volcano — here you can find pyrite crystals; they are especially noticeable in the sun.