Ключевые слова: an, bolt, bridge, cardona, catalonia, cave, cavern, corridor, crystal, crystals, deep, depth, digging, embankment, europe, ferrum, gallery, geology, grot, history, icicles, industry, interior, iron, jumper, mine, mineral, mining, natural, nobody, old, onyar, river, river onyar, rock, saline, salt, salty, screw, solid, spain, stalactites, stone, subterranean, texture, tunnel, underground, wall, waterfront,