One of the excuses for the cost of transportation projects here in the United States is the complexity of construction in urban situations. In the photo above, from about 1998, Berlin's high water table is evident, as most of the terminal's below-grade construction is flooded. Clear in this shot is:
To the immediate south, across the Spree River, is the government quarter. The shot below was taken in March 2002 from the south of the Spree. Just 3 months later, the station was opened for its first passengers. Yes- amazing.