sentences:  Probably the most well-known Icelandic rail project, the Reykjavík Harbour Railway, of narrow gauge, operated from 1913 until 1928 for the construction of the harbour breakwaters.The railway operated from a quarry outside the city, Öskjuhlíð, from which it ran a short distance to a junction, passing loop, and sidings.This junction was located just south of a large field which became (and remains) the Reykjavík city airport.