Ключевые слова: ancient, calcite, cave, caverns, caving, ceiling, dark, deep, discovery, drop, earth, geology, ground, indoors, light, limestone, mineral, moist, monument, nacave, national, natural, nature, nobody, old, passage, rock, rocky, salt, scenic, shade, speleology, stalactite, stalagmite, stone, subterranean, tourism, tunnel, underground, view, visit, visitor, wall, wet,