The 3,000-foot tunnel — which reached depths of around 50 feet underground at its deepest point — was equipped with lighting, ...

U.S. Border Patrol agents recently uncovered a sprawling tunnel they suspect was involved in large-scale narcotics smuggling.

At least four men died in the 1925 collapse, and the locomotive and at least two bodies remain entombed in the tunnel that was sealed at both ends a year later. The western entrance of the 4,000 ...