Ключевые слова: abstract, attraction, background, beautiful, beige, brown, cave, cavern, destination, dripstones, famous, formation, formations, indoors, inside, internal, landmark, large, limestone, many, mineral, mountain, natural, nature, nobody, object, place, popular, rock, scenic, sight, sightseeing, speleothem, stalactite, stalactites, stalagmite, states, stone, tour, tourism, travel, underground, united, vacation, valley, view, visit, visitor,