Circumpolar in an abandoned station near Buitrago de Lozoya in Madrid. It's been a few months since this photo was taken, but we've had it re-processed. In total there are 450 photos, each of them taken during 30s at f/2.8 and ISO 3200, with the Nikon D7100 and Tokina lens at 11 mm.
Un trabajo muy interesante tío!