Jaigarh Fort was constructed more as a protective measure than as a palace, unlike the Amer fort that has extravagance written all over it. Built atop a hill, Jaigarh fort stretches for 12 kilometres (seven miles) and serves as an impenetrable fortress protecting both, the Amer Fort and Amer Village. Back in the day, it served as a cannon foundry. Though defense was its main purpose, the fort wins one over with its ornate palace complexes too. It further fascinates onlookers with its underground tanks that delineate the ingenious nature of the fort's foresighted architects. However, Jaivan, the wheel-enabled canon continues to be the most important feature of the Jaigarh Fort. With its 6.15 meter (20 feet)-long, ornately-carved barrel and a range of more than 32 kilometers (20 miles), this behemoth of a weapon is believed to be the largest of its kind in the world.