Ключевые слова: abstract, arrangement, asia, bay, beauty, cat, cave, color, colored, culture, deep, descriptive, destinations, famous, formation, geology, grotto, halong, horizontal, illuminated, image, in, indochina, karst, landmark, landscape, light, limestone, multi, national, nature, nobody, orange, pattern, place, rock, scenics, speleology, spelunking, stalactite, stalagmite, stone, tourism, tourist, traditional, travel, tunnel, underground, unescoworldheritage, vietnam, vietnamese,