Kalaureia (Ancient Greek: Καλαυρεία) or Calauria or Kalavria (Greek: Καλαυρία) is an island close to the coast of Troezen in the Peloponnesus of mainland Greece, part of the modern island-pair Poros.
Strabo describes the coastwise journey along the Hermionic Gulf:
In Greek mythology, Melantheia or Melanthea (Ancient Greek: Μελανθείας) was the daughter of the river-god Alpheus, and thus she can be counted as a naiad. Melanthea bore to Poseidon, Eirene whom the earlier name of Calaurea was called after her (Eirenê). Later on, this island was named Anthedonia and Hypereia by the companions of the siblings Anthus and Hypera.
Poros (Greek: Πόρος; Modern Greek pronunciation: [ˈporos]) is a small Greek island-pair in the southern part of the Saronic Gulf, about 58 km (36 miles; 31 nautical miles) south of the port of Piraeus and separated from the Peloponnese by a 200 m (656 ft) wide sea channel, with the town of Galatas on the mainland across the strait. Its surface area is about 31 square kilometres (12 sq mi) and it has 3,261 inhabitants (2021). The ancient name of Poros was Pogon. Like other ports in the Saronic, it is a popular weekend destination for Athenian travellers.
Poros consists of two islands: Sphaeria (Greek: Σφαιρία, pronounced [sfeˈria]), the southern part, which is of volcanic origin, where today's city is located, and Kalaureia (Greek: Καλαυρία, [kalavˈria]), also Kalavria or Calauria (meaning 'gentle breeze'), the northern and largest part. A bridge connects the two islands over a narrow strait.