Ключевые слова: asia, awe, backgrounds, beauty in nature, cave, cave paradise, cultures, geology, grotto cave, heaven, horizontal, idyllic, imitation, indoors, landscaped, majestic, national landmark, nature, shape, social history, speleology, staircase, stalactite, stalagmite, stone object, tourism, tourist, travel, travel destinations, underground, unesco world heritage site, vietnam,