Ключевые слова: big room, calcite, calcium carbonate, carlsbad, carlsbad caverns, carlsbad caverns national park, cave, cavern, caverns, caves, eddy, eddy county, entrance, formation, geology, grotto, guadalupe mountains, limestone, limestone cave, mineral, national park, natural, new mexico, park, parks, southwest, speleology, stone, subterranean, tourism, underground, walkway,