Mount Olympus (/ɵˈlɪmpəs/; Greek: Όλυμπος; also transliterated as Olympos, and on Greek maps, Oros Olympos) is the highest mountain in Greece and the second highest mountain in the Balkans. It is located in the Olympus Range on the border between Thessaly and Macedonia, between the regional units of Pieria and Larissa, about 80 km (50 mi) southwest from Thessaloniki. Mount Olympus has 52 peaks, deep gorges, and exceptional biodiversity.