Ключевые слова: abstract, asia, asian, bark, brown, canyon, cave, cavern, cliff, dark, geology, landscape, laos, luang, luang prabang, mineral, mountain, natural, nature, old, pattern, prabang, river, rock, rocks, speleology, stalactite, stalagmite, stone, subterranean, texture, thai, thailand, tourism, travel, tree, underground, vang, vang vieng, vieng, wall, water, wood,