Ключевые слова: adventure, ancient, archeology, attraction, background, beautiful, beauty, cango, cave, cavern, caves, chiangdao, chiangmai, crystal, dark, drogarati, earth, formation, frasassi, geological, geology, greece, inside, interior, italy, kefalonia, landmark, limestone, national, natural, nature, nerja, park, rock, rocky, stalactite, stalactites, stalagmite, stalagmites, stone, thailand, tourist, travel, underground,