Le Portel, railroad
This tunnel goes miles into the mountain. There is no visible exit at the end. The Germans used it from 1941 till 1943 for a 21 cm K 12 railroad gun and called it Stp Salblei. The unit was E Batterie 701.
But the carved date proves that it is French from origine.
Very impressive and along the long walk we found nice things.
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