A Byzantine century port was discovered at the dig site, loaded with historic boats and clay pots.
"[T]he port's discovery by the tunnel excavation is proving to be a nightmare for its builders.
Fifty meters below the Bosphorus waterway, workers are toiling away to make up for the three years lost to the archeology excavation. The tunnel, when complete, will allow subway trains to run the length of the city carrying a million of people a day."
Thanks to Sean Holden