4. Nadir Shah's treasure
The Persian invader Nadir Shah attacked India in 1739 and entered Delhi with an army of 50,000 men.
The plunder and loot that Nadir Shah's men carried out led to the massacre of 20,000-30,000 innocents in Delhi.
The loot was so massive that his treasure caravan was said to be 150 miles long on his way back to Iran.
According to an apocryphal tale, on his way back to Persia, he was murdered in his tent, but according to historical records he was actually murdered in1747.
In any case, if the tale is to be believed, his assassin, Ahmad Shah succumbed to some illness and died a gruesome death, but locals believe before his death, he managed to conceal the bulk of Nadir Shah's treasure somewhere in the labyrinth of tunnels of Hindu Kush Mountains (probably in Kandahar).
Nadir Shah's loot included millions of gold coins, sacks of jewels, the sacred Peacock Throne (now in Iran) and the fabled Koh-i-noor diamond, which today can be found in the British Crown Jewels.
