Jaivan Cannon, Amber, Rajasthan India

Jaivan is famous as the largest cannon in the world; it has been positioned at the top of a tower inside the fort. It has a trajectory of about 20 km, 8 m barrel, and weighs approximately 50 tons. The Jaivan cannon has wheels with nine feet in diameter and twenty feet long barrel. It is said that Jaivan is so big that it took four elephants to rotate on its axis. However, most surprising point is that the Jaivan cannon was never used till date. It was only tested by Jai Singh during 1720AD and the ball of cannon fell about 38km away. The collision of this test fire resulted in collapse of many homes in Jaipur and the formation of a lake on the spot.