It is located 6.2km east of Milos, 2km southeast of Kimolos and 15km southwest of Sifnos. It is the biggest uninhabited island of the Aegean and one of the biggest uninhabited islands in the Mediterranean. It extends over about 18.146km2 and its coast length is 27km. In its middle part there is a valley and two hills rise: Stroggylo (370m) and Psilo Vouno (330m). The coasts are rocky, steep and harbourless –except for the western and northern part of the island, where there are coves which can be accessed more easily. Along with Milos and Kimolos, it belongs to the volcanic arch of South Aegean. Its biggest part is covered by volcanic rocks. Its name indicates its use as a pasture land since the antiquity. In the Middle Ages it was known as Polivos, Polinos or Ypolivos. In 1951 there were 14 residents on the island. They were cattle breeders and they lived in a small, now ruined, settlement. On the northwestern part of the island there are two quarries, where trachyte was quarried for the construction of millstone. In the late 19th century silver deposits (barite) were discovered. The Greek state characterized the island as an area of outstanding beauty, aiming at the protection and preservation of the natural environment and the architectural inheritance.
The circumnavigation of Polyaigos by boat
Sailing around Polyaigos you will see Mersini, Kato Mersini, Galazia Nera (Azure Waters –an appellation that the visitors gave due to the rocks and the colour of the sea, while the real name of the area is Hohlakia), Fykiada. Galakteri is a cave in which the monk seals Monachus monachus come to lay their eggs in September-October and in March-April. If you happen to be in the area you should not disturb them. Kalogeros of Sykia (it is also called hunchback), is the second pointy rock that rises in the area of Sykia (Fig tree), which got its name after the big fig tree that is located on the river of the slope with the carob trees. Then you will see Kalogiri, with the impressive rocks in red and pink hues, as well as Kakovola, where you should be careful as there are shoals. Later on you will pass by Amoura and the lighthouse. An impressive cave with a hole on its roof is so-called Fanara. The cave of Askitis (Ascetic) indeed took its name after an ascetic that lived there –in fact, if you have a careful look, you will see the hole leading deep inside the rock where he resided. Vorino is a beach with pebbles and sand which is considered a good anchorage during the southern weather conditions and Panagia is a big beach with golden sand and the chapel of Theotokos.