Ключевые слова: ancient, archeology, arid, cave, cavern, cliff, damp, dark, discovery, east, espeloelogo, feature, geologist, geology, grotte, grotto, historical, history, illumination, interior, jama, karoo, karst, landmark, limestone, little, monument, nature, oudtshoorn, picturesque, postojna, postojna cave, postojna jama, postojnska, postojnska jama, river, rock, slovenia, speleological, speleology, stalactite, stalagmite, stone, system, travel, underground, underworld, water, wet,