A valley full of rare geysers and thermal vents in Russia's Kamchatka Peninsula disappeared on June 3 after an entire mountainside collapsed only to reappear few days later after a drop in the water level in the lake, formed by the landslide. The Valley of the Geysers is one of the few places in the world where geysers occur naturally. More than 20 large jets and 200 smaller thermal springs burst through the Earth's crust in this 7-sq km area. The landslide, probably caused by an earthquake, had blocked the Geyser river.