At Mexico's narrowest point, between the Pacific and Atlantic oceans, the government is building a railway to rival the Panama Canal, with promises of economic bounty but amid fears of environmental and social harm.
The Spanish conquistador Hernan Cortes had dreamed of such a crossing for humans and goods in the 16th century, but most plans came to naught and a prior, rudimentary connection was all but abandoned with the opening of the canal cutting through Panama in 1914.
Then, in 2020, work started on a new coast-to-coast link under the government of President Andres Manuel Lopez Obrador.
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