Poros is a nice green island pair in the southern part of the Saronic Gulf south from Piraeus. Poros consists of two islands: Sphairia or Sferia, the southern part, which is of volcanic origin, where today’s city is located, and Kalaureia, also Kalavria or Calauria (meaning ‘gentle breeze’), the northern and largest part.
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.
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The picturesque town of Poros with its beautiful neoclassical buildings is built amphitheatrically on the slopes of a hill. Its most famous landmark is a clock tower, built in 1927. The Archaeological Museum at Korizis Square houses findings from the Sanctuary of Poseidon, from ancient Troizene, and from other archaeological sites nearby.
In the northern part of the island there are the remains of the Sanctuary of Poseidon, the centre of the Kalaureian amphictyony.