Ключевые слова: adventure, amazing, attraction, below, calcite, calcium, castellana, cave, cavern, caving, column, dark, darkness, deep, environment, erosion, explore, flowstone, formation, geologic, geological, geology, grotto, inside, karst, limestone, mineral, mysterious, national, natural, nature, rock, speleology, spooky, stalactite, stalagmite, stalagtite, stone, subterranean, time, tourism, underground, underworld, view, wall, wet,