Kastellorizo or Castellorizo (Greek:Καστελλόριζο - Kastellorizo, officially Μεγίστη - Megísti or Meyísti) is a Greek island and municipality located in the southeastern Mediterranean. It lies roughly 2 kilometres (1 mile) off the south coast of Turkey, about 570 km (354 mi) southeast of Athens and 125 km (78 mi) east of Rhodes, almost halfway between Rhodes and Antalya and 280 km (170 mi) to Cyprus. Kastellorizo is part of the Rhodes regional unit.