The Alamut geographic region (Persian: الموت‎; Alamūt) is a region in Iran including western and eastern parts in the western edge of the Alborz (Elburz) range, between the dry and barren plain of Qazvin in the south and the densely forested slopes of the Mazandaran province in the north. Starting from Qazvin toward Alamut, passing through the first range of hills, curvatures, forms, are significant themes in nature's composition of this area. Two big citadels of Ismailis, Lambsar and Alamut castles, are in this area. Hassan-i Sabbah and his Hashshashin controlled the area for many years.
In 1090 CE, Hassan Sabbah, the leader of Ismailites in Iran, chose the Alamut region as his headquarters to campaign, preach and convert new followers. This proved to be a turning point for the destiny of Alamut Valley. The result of over two centuries of Ismailite stronghold, the region witnessed numerous castles throughout, of which at least 20 "castles" dating back to this era have been identified. The most magnificent castle in the Alamut Valley is the Alamut Castle, which is built on top of a high rock reaching 2163 m above sea level near the Gazor Khan Village. The rock is 200 m high and covers an area of 20 hectares (49 acres); with its steep slope and deep and dangerous ravine, the rock is practically inaccessible and forms a part of the fort’s structure. Currently, only ruins of the fort and some towers are apparent, and it is only through archaeological excavation that the main portions can be discovered.
On the summit of a ragged peak in the Alborz Mountains there lies the ruins of one of history’s most fearsome secrets. Today, it towers above the sleepy village of Moallem Kalayeh in a secluded valley that has been all but forgotten by the outside world. But for centuries, the inhabitants of Alamut shaped the fate of empires and brought terror to the hearts of rulers from the British Isles to the Indian subcontinent.
 ‘Alamut’, meaning ‘the Eagle’s Nest’.