Poros is a small Greek island-pair in the southern part of the Saronic Gulf, about 31 nautical miles south from Piraeus and separated from the Peloponnese by a 200 m wide sea channel, with the town of Galatas on the mainland across the strait. 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: Sphairia, the southern part, which is of volcanic origin, where today’s city is located, and Kalaureia (meaning ‘gentle breeze’), the northern and largest part. A bridge connects the two islands over a narrow strait. Poros is an island with rich vegetation. Much of the northern and far eastern/western sides of the island are bushy, whereas large areas of old pine forest are found in the south and center of the island.
It has a good road network and adequate tourist infrastructure, which makes it a popular resort for short holidays.