The Geghama mountain range in Armenia is tableland type watershed basin of Sevan lake from east, inflows of rivers Araks and Razdan from north and west, Azat and Vedi rivers from south-west and Arpachai river from south. The average elevation of Geghama mountain range is near 2500m. The range is volcanic origin including a large quantity of extinct volcanoes. The range is 70km length and 48 km width. The highest point – volcano Azhdahak, elevation - 3597.3m above sea level is located in the western part of the range. There is lake in the crater of volcano Azhdahak that is formed from melting snow.
Bird fauna of Geghama Mountain Range includes about 250 species, what makes 70% of all Armenia’s avifauna.
The South-Eastern slopes of Geghama mountains go across the legendary Khosrov forest in the basin of the river Khorov.
A great number of petroglyphs - rock-carvings has been found in the area of Geghama Mountains. Most images depict men in scenes of hunting and fighting, as well as astronomical bodies and phenomena: the Sun, the Moon, constellations, the stellar sky, lightning, etc.