Ключевые слова: above, active volcano, aerial, aerial view, alert, batok, bromo, caldera, cemoro lawang, crater, east java, erupting, eruption, gases, hike, hiking, indonesia, java, jeep tour, landscape, massif, mount, mount batok, mount bromo, mount bromo caldera, mount penanjakan, mountain, national park, natural park, nature, nature reserve, outdoor, sea of sand, semeru, smoke, sulfur, sulfuric gases, tengger caldera, tengger massif, tourism, travel, trek, trekking, viewpoint, volcanic activity, volcanic ash, volcanic gas, volcano, volcanology, widodaren,