The Sky of Madrid by DanielF
Being a large city with serious traffic problems, Madrid also has to deal with a considerable air pollution. However, Madrid benefits from the fresh air that comes from the nearby Sierra de Guadarrama. It is indeed the highest capital in the European Union at 655 meters over the sea level (Moreover, it is only second to the micro-capital of Andorra at continental level).
This mountain breeze cleans the air of Madrid and adds to the spectacular blue skies that the city enjoys during most of the year and that have inspired such world known painters as Velázquez or Goya.