Transit Archeology: Tour of abandoned subway network offers a glimpse of how the T was built

"Boston’s bars have poured their last drinks. Stragglers are stumbling home. But beneath the modern metropolis, in the bowels of the city, a group of six men wanders abandoned tunnels with heavy coats and flashlights, dodging the occasional rodent, to uncover the lost relics of America’s first subway system."

Click here for a look at Boston's transit past.