Buenos Aires Underground Opens

The Buenos Aires Underground's Line A opened on July 24, 1909, running from Plaza de Mayo to Plaza Miserere. Built by the Anglo-Argentine Tramways Company with British engineering expertise, it featured wooden cars powered by overhead lines and navigated tunnels beneath the bustling city center. This innovation addressed severe traffic congestion from horse-drawn trams and early automobiles, serving thousands of daily commuters. It connected key commercial districts and symbolized Argentina's rapid urbanization during the Belle Époque. The line's success spurred expansion and influenced subway designs across Latin America, cementing rail's dominance in dense urban mobility.