The public transport system in Istanbul being what it is, that is: a constantly growing network with generally fast and comfortable light railway or trams, or metro’s (or busses: particularly in hilly areas a joy to see the drivers keep up speeds that most of my (Dutch) compatriots would think ludicrous in our flat country), I kind of made it a mission to at least travel some of the lines to their very ends.
In December 2015 on a clouded day I took the M3 (Wikipedia), officially referred to as the M3 Kirazli–Basaksehir–Olimpiyatkoy Metro Line (Turkish: M3 Başakşehir Metro Hattı), is a 15.9-kilometre (9.9 mi), 11-station rapid transit line of the İstanbul Metro system on the European part of Istanbul, Turkey. It operates between Kirazlı-Bağcılar, extending the service of the M1B line from Aksaray, to Başakşehir-Metrokent or Olimpiyat, branching off at the İkitelli Sanayi junction station. I got off at Başakşehir and stayed there long enough to get soaked and bored. There was a bakery selling sweetmeats where it was warm, then I headed back to the old city. But not before taking some pictures that give an impression of what to expect at this end of a line.