Ключевые слова: adventure, aged, ancient, asia, attraction, big, borneo, cave, cavern, caving, chamber, deep, earth, erosion, exotic, formation, geology, ground, inside, interior, karst, landscape, limestone, malaysia, national, natural, nature, niah, old, park, rock, rough, scenery, scenic, stalactite, stalagmite, stone, tourism, travel, tropical, underground, wall, weathered,