Ключевые слова: asia, asian, blue, cascade, cave, cavern, clouds, creek, dark, environment, fall, falls, flowing, geology, green, hole, landscape, laos, light, luang, luang prabang, minera, mountain, natural, nature, night, prabang, river, rock, rocks, sky, speleology, stalactite, stone, stream, thai, thailand, tourism, travel, underground, water, waterfall,