Every few hours, on the causeway across Panama’s Lake Gatun, a diesel engine comes into view, hauling wagonloads of containers stacked two high.
They are making the 80km journey between the Atlantic and Pacific on the Panama Canal Railway, opened in 1855, which proudly boasts of being the world’s first trans-continental rail line.
The causeway takes the railway, opened 59 years before the canal, across a vast artificial lake created during canal construction.
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