Ключевые слова: acid, acid lake, acidic, active volcano, adventure, aerial, aerial photography, aerial view, asia, blue, caldera, cloud, clouds, crater, crater lake, east java, eruption, fog, gas, ijen, indonesia, java, jawa, kawah, kawah ijen, lake, landscape, mining, mist, mountain, mountains, nature, outdoor, power in nature, rock, sky, smoke, smoke background, sulfur, sulfur mining, sulfuric acid, sulphur, tourism, toxic, travel, turquoise, view, volcanic, volcano, water,