Sidrokastro: The town of Sidirokastro, (meaning «iron castle» in Greek), is situated 25km. away from the town of Serres, being crossed by the Krousoritis river. It has a population of approximately 5,500 inhabitants and it is divided into two sections which are connected by traditional bridges. The area of Sidirokastro is rich in minerals, such as marble, iron, lignite, as well as geothermal springs.
Of great interest are the ruins of the Byzantine castle, the Issari Fort, (standing 155m. tall) and the beautiful wetland habitat of the artificial lake Kerkini.
The visitor may find here all kinds of facilities including hotels, tavernas, cafeterias and commercial shops.