Ключевые слова: amazing, attraction, beautiful, cave, cavern, color, colored, column, dark, darkness, deep, discovery, erosion, europe, exploration, formation, geologic, geology, grotto, historic, illuminated, light, limestone, mediterranean, mineral, mining, multicolored, mystery, natural, nature, resources, rock, rocky, scary, scenery, sightseeing, speleology, stalactite, stalactites, stalagmite, stalagmites, stone, subterranean, touristic, tunnel, under, underground, unusual, vacation, wall,