Ключевые слова: abandoned, black, cave, cavern, coal, construction, corridor, dark, dig, dirty, entrance, gallery, geology, historical, industrial, industry, interior, iron, krakow, lamp, light, machine, mine, miner, mineral, mining, mystery, old, poland, railway, rock, salt, salt mine, shaft, stone, train, tunnel, tunneling, underground, way, wieliczka, wood, wooden, work,