Dutch authorities have opened a new subway line, running down some of Amsterdams most historic sites after 15 years of construction due to delays and controversy. The North-South Line extends over nine kilometers, connects the north of the city to its south, and runs down the Canal Belt area and the IJ River. Amsterdam Mayor Femke Halsema said on Saturday: “Its a major step towards the future of the city.” The German News Agency reported that this line is one of the most controversial construction projects in the history of the Netherlands, costing nearly three billion euros ($5.3 billion) - more than double of the original budget, and opened seven years after the set date.