Ключевые слова: america, attraction, beautiful, big, calcite, carlsbad, cave, cavern, caverns, column, dark, darkness, delicate, earth, formation, fragile, geologic, geology, giant, grotto, hall, illumination, mineral, mineralized, monument, national, natural, nature, new mexico, nobody, park, petrology, pillar, rock, room, scenic, shadow, southwest, space, speleology, stalactite, stalagmite, standing, stone, subterranean, tour, tourism, tourist, travel, underground, underworld, usa, view, visit,