Growing your own house may seem like a new idea, but what about growing pieces of functional infrastructure? That’s exactly what the locals of Nongriat in Meghalaya, India have been doing for the past 500 years. In that time, they’ve grown bridges over one hundred feet in length and strong enough to support the weight of more than 50 people. There are even “double decker” bridges!

http://www.architizer.com/en_us/blog/dyn/29362/living-infrastructure/