Ключевые слова: big pit, black, blaenavon, building, coal, colliery, editorial, equipment, europe, exterior, extraction, fuel, heritage, historic, historical, history, industrial, industry, landmark, landscape, machines, metal, mine, mineral, museum, national, old, outdoor, pithead, power, rust, rusty, shaft, site, steel, tourism, tourist attraction, tower, trail, transportation, travel, uk, united kingdom, wales, wheel, winding, work,