Nynäshamn is a locality and the seat of Nynäshamn Municipality, Stockholm County, Sweden with 13,510 inhabitants in 2010. While interest in the area as a potentially useful port grew from the mid-19th century, it was only with the opening of the railway station to Stockholm in 1901 that Nynäshamn started to develop.
Markus Bernet, CC BY-SA 2.5 , via Wikimedia Commons