Ключевые слова: attraction, beautiful, calcite, calcium, cave, cavern, color, column, deep, earth, exploration, explore, formation, formations, geologic, geological, geology, grotto, hole, illuminated, inside, interior, karst, light, limestone, mineral, minerals, mysterious, mystery, natural, nature, rock, rocks, speleology, stalactite, stalactites, stalagmite, stalagmites, stone, subterranean, tourism, travel, underground, water,