Assam, home to the world’s oldest operating refinery
DigBoi in Assam is prized for being the world’s oldest operating refinery, which has been operating since 1901. Digboi is a town in Tinsukia district of Assam, where the British first noticed oil on the feet of the elephants returning from the forest. Later, they asked the local labourers to dig the land for oil and kept exclaiming, “Dig Boy, Dig”,’ and hence the name DigBoi.