● The bridges are tangles of massive thick roots, which have been intermingled to form a bridge that can hold several people at a time. ● Khasi people have been trained to grow these bridges across the raised banks of streams to form a solid bridge, made from roots. ● The living bridges are made from the roots of the Ficus elastica tree , which produces a series of secondary roots that are perched a top huge boulders along the streams or the riverbanks to form bridges.