Kalamos (island) in the context of "Lefkada (regional unit)"

Kastos (Greek: Καστός) is a Greek island and a former community east of the island of Lefkada, Ionian Islands, Greece. Since the 2011 local government reform it is part of the municipality Lefkada, of which it is a municipal unit. Until 1974, when it became part of the Lefkada Prefecture, the island was administered under the Cephalonia Prefecture (Ithaca province). The nearest island is Kalamos, with a deep channel between them; the mainland is approximately 5 kilometres (3 miles) to the northeast in Aetolia-Acarnania.

Astakos (Greek: Αστακός, meaning "lobster") is a town and a former municipality in Aetolia-Acarnania, West Greece, Greece. Since the 2011 local government reform it is part of the municipality Xiromero, of which it is a municipal unit. The municipal unit has an area of 345.099 km. It is located on a bay on the eastern shore of the Ionian Sea, near the southern end of the Acarnanian Mountains. It takes its name from the ancient Acarnanian town Astacus (Ancient Greek: Ἄστακος - Astakos), and was named Dragamesti in the Middle Ages. It is speculated to be the site of ancient Dulichium.

It is 16 km southeast of Kalamos (island), 30 km southwest of Agrinio, 35 km northwest of Missolonghi and 55 km southeast of Preveza.