* Domes and lava flows cover the SE half of Polyaigos. The intense tectonism of the volcanic rocks along the major rifts of NW-SE direction on the southern cape has detached small islets that are called Kalogiri. They have various sizes. They form impressive rock formations, due to the wind erosion, offering images of rare beauty.
* Source: Atlas of Geological Monuments of the Aegean/Publication of the Ministry of the Aegean, 2002, www.ypai.gr