The Khasi people live in the Indian state of Meghalaya, in one of the wettest regions on Earth. To cross the many rivers in the area, they've devised a way to grow their own bridges using the secondary root system of Ficus elastica trees. Some of these bridges stretch for more than 30 meters (100 feet).
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Key Facts In This Video
The Cherrapunji region in India is one of the wettest places in the world. 00:09
When directed through hollowed-out logs, the secondary roots of the Ficus elastica can grow into strong bridges. 00:30
See a "double decker" root bridge: 01:20