Syros is located at the centre of the Cyclades. It has Kythnos at the west, Tinos and Andros at the north, and Mykonos at the east. It extends over 84km2. The terrain of the island is mainly rocky and infertile, with stone walls and low vegetation. The south part has pine groves and some lush points. The highest peak is Pyrgos (431m).
It has bays, capes and two big natural ports, Ermoupoli at the east and Finikas at the west. Thus it was split in Ano and Kato Meria. In the past, at the estuaries of small torrents there were small water biotopes around which dunes used to form, important biotopes for the migratory birds. Mostly in Ano Meria 11 reptile species inhabit and the European green toad (Bufo viridis), an amphibian species, 47 bird species, including golden eagles, peregrine falcons, larks, etc., as well as hares and wild rabbits. Northern Syros is one of the important locations in Greece for migratory birds. In fact, mountain Syringas has joined the community network of protected areas “Natura 2000”. The Mediterranean monk seal (Monachus Monachus) finds shelter on the coasts of the island.