to Iran following the Bolshevik revolution in Russia. Iranian nationalism is partly the product of Azerbaijani intellectuals. Azerbaijani provinces have played a major in the cultural and economic life of Iran in both the Pahlavi era as well as the Iranian Constitutional and Islamic revolution. Monuments The Iranian provinces of Azerbaijan, both West and East, possess a large number of monuments from all periods of history. Geography Iranian Azerbaijan is generally considered the north-west portion of Iran comprising the provinces of East Azerbaijan, West Azerbaijan, and Ardabil. It shares borders with the Republic of Azerbaijan, Armenia, Turkey, and Iraq. There are 17 rivers and two lakes in the region. Cotton, nuts, textiles, tea, machinery, and electrical equipment are the main industries. The northern, alpine region, which includes Lake Urmia, is mountainous, with deep valleys and fertile lowlands. The region is bounded in the north by Armenia and the Republic of Azerbaijan and in the West by Lake Urmia and Kurdish-inhabited areas of Iran, and in the East by Gilan. Mountains Sabalan is an inactive stratovolcano in Ardabil province of northwestern Iran. It is the third highest mountain in Iran and has a permanent crater lake formed at its summit. Sabalan has a ski resort (Alvares) and different tourist areas such as the Sarein spa. The mountain is known for its beautiful vistas, including the Shirvan gorge, where few climbers ever venture. Elevation of Sabalan is . Sahand is a massive, heavily eroded stratovolcano in northwestern Iran. At , it is the highest mountain in the Iranian province of East Azerbaijan. Eynali is a small mountain range in north of Tabriz, Iran. The range has a couple of peaks including Eynali (), Halileh (), Pakeh-chin (), Bahlul () and the highest one Dand (). Mount Bozgush and Ağ Dağ is a volcanic mountain south of Sarab and north of Mianeh, East Azerbaijan Province, Iran. Tulips are cultivated on the rich volcanic soil of Mount Bozgush, and medicinal herbs such as pennyroyal, thyme, borage, nettle and liquorice grow wild on the mountain's slopes. Mount Bozgush is a stratovolcano composed mostly of andesite. Rivers Most of the biggest rivers in Azerbaijan flow into either Urmia Lake or the Caspian Sea (both of which are endorheic). Some of the major rivers are: Urmia Lake basin: Aji Chay (Quri Chay), Zarriné-Rūd, Gadar River and many small permanent and seasonal rivers. Caspian Sea basin: Qizil Üzan,