The hidden tunnel Air Raid Shelter with giant stones in it

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Photo credit: © WireStock / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: air, architecture, cave, coal, concrete, corridor, dark, deep, depth, geology, hidden, history, industrial, industry, mineral, mining, museum, production, raid, rock, salt, salty, shelter, slope, stone, stones, structure, tourism, travel, tunnel, underground, wall, wet, wood