WNYC - Slideshow: Journey to the Center of Manhattan
“A tunnel burrowing east, 90 feet below Grand Central Terminal.Standing about 100 feet below Grand Central Station, MTA workers are burrowing through solid rock, connecting four out of eight Long Island Railroad tunnels to a central hub. Officials are projecting September 2016 as the date of completion. Here is a sneak peak at how far they’ve come.”
