Jaigarh Fort in Jaipur was built by the ruling King Jai Singh II in the year 1726. With an expansive layout overlooking Amer Fort, the fort boasted of exuberance and royalty. It was built to be a defensive structure, than a palace itself, by the king. The highlight of the fort is the connecting underground pathway between Amer Fort and Jaigarh Fort to help people reach safety, in case of an attack.The fort provides an excellent view of the Aravalli Range and Maota lake, and is actually built atop the Hill of Eagles, also known as Cheel ka Teela. It is structurally and architecturally quite similar to Amer Fort. It served as the residence of many kings and was also used to store weapons, artillery and ammunition of the Rajput rulers along with other military utilities. It was said to be the main cannon foundry for the Mughal rulers. The cannon outpost was protected during the many consecutive wars that broke out in the Mughal dynasty in 1658, until the protector Dara Shikoh was beaten in battle and slain by his own brother Aurangzeb.During the reign of the Mughal Emperor Shah Jahan, Jaigarh Fort came to be known as the world’s most efficient cannon foundry. It was mainly given this title because of the presence of massive iron ore mines located along the vicinity of the fort. The wind tunnel of the cannon foundry is said to suck in the hot air from outside and help in melting metal to build the cannons, with temperatures inside soaring as high as 2400 °F.