Kozani is a town of 70,000 people located 120km northwest of Thessaloniki in the mountainous region of Greece. It has cold winters and dry summers. Kozani is known for producing 75% of Greece's electricity through local power plants and for cultivating saffron. Other local products include marble and wines. An important annual celebration is the 12-day Carnaval festival featuring costumed dancing and bonfires. Points of interest in Kozani include the church bell tower, a notable library, folklore and natural history museums, and the artificial Polyfitos Lake.