Amsterdam's New Metro Line
It's only 9.7km long, but the Noord/Zuidlijn (north–south metro line) stretched into a challenge of far greater proportions. The project began in 2003 and was originally targeted for completion by 2011, but when engineers tunnelled under the IJ river and the centuries-old buildings of Amsterdam's city centre, some of the historic monuments in the centre started to shift off their foundations, construction was halted and debates flared over whether to continue, even though the budget was running sky-high, or quit, and lose the millions of euro already spent.
The city ultimately decided to proceed. Additional support beams were added beneath the affected buildings, and the line finally opened in July 2018. From Station Noord, it now travels south to Noorderpark then below the IJ to Centraal Station, Rokin, Vijzelgracht, De Pijp, Europaplein (next to the RAI convention centre) and Station Zuid.
Archaeological finds unearthed during excavations are displayed in glass cases between the escalators at the Rokin metro station.