Zenica is an industrial city (the fourth largest, after Sarajevo, Banja Luka and Tuzla) in Bosnia and Herzegovina and the capital of the Zenica-Doboj Canton of the Federation of Bosnia and Herzegovina entity. It is located about 70 km north of Sarajevo and is situated on the Bosna river, surrounded by mountains and hills. The modern city is dominated by the Zenica Steelworks and the air can be toxic, making it difficult to walk around.