Ключевые слова: abstract, ancient, beautiful, bright, cave, cavern, dark, darkness, deep, entrance, exploration, geologic, geological, geology, inside, interior, landscape, light, limestone, mae sot, mountain, mysterious, national, natural, nature, nobody, old, park, rock, shadow, speleology, stalactite, stalagmite, stone, system, tak, thai, tourism, travel, tunnel, underground, wall, world,