The Greater Caucasus range lies to the northeast along the border with Russia and extends into northeastern Azerbaijan and runs southeast to the Absheron Peninsula.
There are mineral springs and very active mud volcanoes in Kobustan Mountain, which is situated near Baku.
The highest peak in the Republic of Azerbaijan is Bazarduzu (4,466 metres or 14,652 feet).
Most of the ridge elevation is over, 3000m high: The spurs of the Lesser Caucasus (also called Little Caucasus, Russian Maliy Kavkaz) in southwestern Azerbaijan includes Shahdagh, Murovdagh, Karabagh Upland, Mikhtoken, Eastern Goyche, Dereleyez and Zangezur ridges, most of the Karabakh volcanic plateau, Bashkend- Destefur saddle.
[3] Talysh mountains (Azerbaijani: Talış dağları, Талыш дағлары, تالش داغلارى; Persian: کوههای تالش, Kuhhâye Tâleš) lies southeastward from the Lankaran Lowland in southeastern Azerbaijan to the lower part of the Sefid Rud in northwestern Iran.