Ключевые слова: active volcano, ash, beautiful, black, black ground, blue, botany, catania, eruption, etna, etna volcano, europe, exterior, extreme terrain, famous, field, geology, hiking, hill, idyllic, italian, italy, landscape, lava, mount, mountain, national park, natural, nature, outdoor, pine, sicilian, sicily, sky, snow, sunny, terrain, tourism, travel, tree, vacation, vegetation, volcanic, volcanic ash, volcano, winter,