This appears to be an old \\\"diveunder\\\" railway route at Pomarão, the terminus of the São Domingos to Pomarão Line, where ore was transferred to ships on the River Guadiana.
2749/6579
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Pomarão
This appears to be an old \\\"diveunder\\\" railway route at Pomarão, the terminus of the São Domingos to Pomarão Line, where ore was transferred to ships on the River Guadiana.