Pictured above: Opening Day February 3, 1918, Twin Peaks Tunnel Screen Shot/ Contributed by Screen Grab©
VAV!/February 3, 2015
The Twin Peaks Tunnel is a 2.27-mile long light rail transit/streetcar tunnel located in San Francisco, California, running under Twin Peaks. Bringing streetcar service to the southeast corner of San Francisco, in its heyday, it was one of the longest railway tunnels in the world.
The eastern entrance to the tunnel is located near the intersection of Market and Castro streets in the Castro neighborhood, and the western entrance is located at West Portal Avenue and Ulloa Street of the West Portal neighborhood.
While there were unanticipated delays, accidents including workers deaths in an explosion, and excesses in costs associated with the project, the Tunnel's official opening ceremonies took place on February 3, 1918, before thousands of onlookers.