An insightful article on living fig trees used as river bridges in eastern India since ancient times, and how this practice of natural architecture is now making its way to european cities. The Ingenious Living Bridges of India This is an example of ancient techniques that are more functional, eco-friendly and cost-effective in the present age than modern engineering appliances.
There are a couple of photographs on the root bridge in this wiki article. Living root bridge - Wikipedia Some others...
