Ключевые слова: acid water, adventure, background, banyuwangi, beautiful, blue fire, crater, crater lake, danger, east java, emerald, environment, eruption, fog, fumarole, gas, geothermal, heat, hiking, ijen, indonesia, island, java, lake, landscape, mine, miner, mist, mountains, natural, nature, outdoor, rock, scenic, sky, smoke, stone, sulfur, sulfur lake, sulfur mining, sulfur smoke, sulphur, summit, travel, trekking, volcanic, volcano, volcano crater, water, yellow,