How are these bridges made? Bamboo or the hollowed out trunks of the betel nut tree are placed across the stream. Then the roots of the Rubber Tree/Ficus elastica (native to the north-eastern region) are trained to grow in a straight line across the bamboo or betel nut trunk. When they reach the other side they’re allowed to take root on the soil. Over a period of time, as the roots keep growing, the bridge is sturdy and ready for use. Stones are inserted in the gaps later making it look like a stone-covered pathway.
(By Kanak7 )