This picture was taken during a very cold day in Stockholm. The temperature drop was a bit sudden, and there was still no ice on the water. Probably because the water was so much warmer than the air, there was this smoke on the surface of the water. The boat is a ferry that travels from old town in Stockholm to Djurgården, where in summer time, there is among other things, a big amusement park.
I have used different plugins from Nik Software for the processing, together with Photoshop and Lightroom.