Cardona salt mine in Catalonia
Palabras clave
mine,
spain,
catalonia,
old,
natural,
industry,
europa,
salt,
stalactite,
cave,
salty,
wall,
stone,
rock,
history,
deep,
mineral,
geology,
corridor,
tunnel,
underground,
white,
texture,
crystal,
cavern,
saline,
solid
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