Feds Discover ‘Most Sophisticated Tunnel in History’ Along US-Mexico Border

New York Post

A more than 1,300-foot underground passageway stretching from Arizona to Mexico was recently discovered — with the feds calling it “the most sophisticated tunnel in US history.”

The unfinished tunnel — which ran from San Luis, Arizona, to neighboring San Luis Rio Colorado in Mexico — had a ventilation system, water lines, electrical wiring, a rail system and extensive reinforcement, Immigration and Customs Enforcement said Thursday.

Feds unearthed the tunnel after finding a sinkhole along the US-Mexico border in mid-July.

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