Kozani (regional unit) in the context of "Vermio Mountains"

Western Macedonia (Greek: Δυτική Μακεδονία, romanized: Ditikí Makedonía, Greek pronunciation: [ðitiˈki makeðoˈnia]) is one of the thirteen administrative regions of Greece, consisting of the western part of Macedonia. Located in north-western Greece, it is divided into the regional units of Florina, Grevena, Kastoria, and Kozani. With a population of approximately 255,000 people, as of 2021, the region had one of the highest unemployment rates in the European Union.

The Haliacmon (Greek: Αλιάκμονας, Aliákmonas; formerly: Ἁλιάκμων, Aliákmon or Haliákmōn) is the longest river of Greece, flowing entirely on Greek soil in the region of Macedonia, with a total length of 297 km (185 mi). In Greece there are three rivers longer than Haliacmon: Evros (Greek: Έβρος), Strymonas (Greek: Στρυμόνας), both coming from Bulgaria, and Axios (Greek: Αξιός) coming from North Macedonia, but the length of each one of them in Greek territory is less than that of Haliacmon, which flows entirely in Greece. Haliacmon is the traditional English name for the river, but many sources cite the formerly official Katharevousa version of the name, Aliákmon. Today, the only official variant is the demotic Aliákmonas. It flows through the Greek regions of Western Macedonia (Kastoria, Grevena and Kozani regional units) and Central Macedonia (Imathia and Pieria regional units). Its drainage basin is 8,813 km (3,403 sq mi).

The Pierian Mountains (or commonly referred to as Piéria) are a mountain range between Imathia, Pieria and Kozani Region, south of the plain of Kampania in Central Macedonia, Greece. The village of Vergina, where the archaeological site of ancient Aigai lies, is built at the foot of these mountains. The highest point in the range is Flampouro at 2,193m (7,195 feet). The Pierian Mountains are the site of the ski resort of Elatochori. They also have two mountaineering refuges, at 1000m and 1680m.

Voio (Greek: Βόιο, Vóio; Ancient Greek: Βόιον - Boeon) is a mountain range in the southwestern Kastoria and western Kozani regional units in Macedonia, Greece. The mountain is part of the Pindus mountains. Its highest elevation is 1,805 m. It is a densely forested and sparsely populated mountain range. It is drained towards the river Sarantaporos in the west and towards the Aliakmonas in the east. The nearest mountain ranges are Gramos to the west and Smolikas to the southwest.

The nearest villages are Pentalofos in the east, Eptachori in the west and Kypseli in the north. The municipality Voio, named after the mountains, is situated in the eastern part. The Greek National Road 20 (Kozani - Konitsa - Ioannina) passes through the mountains, 2 km south of the highest point. The first home of the Boeotians was the mountain Boion; the mountain gave them their name.

National Road 20 (Greek: Εθνική Οδός 20, abbreviated as EO20) is a single carriageway road in northwestern Greece. It links the cities of Ioannina and Kozani via Konitsa and Siatista. It passes through the Ioannina, Kastoria and the Kozani regional units. Since the opening of the A2 motorway (Egnatia Odos), it is no longer the fastest connection between Kozani and Ioannina. The section between Ioannina and Kalpaki is part of the European route E853.

Kozani (Greek: Κοζάνη, pronounced [koˈzani]) is a town in northern Greece, capital of Kozani regional unit and of Western Macedonia. It is located in the western part of Macedonia, in the northern part of the Aliakmonas river valley. The city lies 710 metres (2,329 feet) above sea level, 15 kilometres (9 miles) northwest of the artificial lake Polyfytos, 120 km (75 miles) south-west of Thessaloniki, between the mountains Pieria, Vermio, Vourinos and Askio. The population of the Kozani municipality is over 67,000 people. The climate of the area is continental with cold and dry winters, and hot summers.

Kozani is the home of the University of Western Macedonia, with about 15,000 students from all over Greece and other places. It is also the seat of West Macedonia's court of appeal, police department, fire brigade, the seat of the 1st Army Corps of the Hellenic Army and of the Bishop of Servia and Kozani.

Siatista (Greek: Σιάτιστα) is a town and a former municipality in Kozani regional unit, Western Macedonia, Greece. Since the 2011 local government reform it is part of the municipality Voio, of which it is the seat and a municipal unit. It lies 28 kilometres (17 miles) southwest of Kozani. The municipal unit has an area of 158.524 km, the community 94.426 km. The 2021 Greek census recorded 5,057 residents in the town and 5,645 in the municipal unit. It was built on the austral slope of the Velia mountain on an (average) height of 930 metres (3,051 feet).