Ключевые слова: america, below, calcite, carlsbad, carlsbad caverns national park, cave, cavern, caverns, crystal, dark, erosion, geological, geology, groundwater, karst, limestone, mineral, national, national park, natural, nature, new mexico, park, rock, speleology, spelunking, stalactite, stalactites, stalagmite, stalagmites, stone, subterranean, textures, tourism, travel,