Jaw-Dropping: The Most Expensive Bridge Projects in the World

11. The Bridge of Living Roots

Situated in Nongriat Village, Pynrusla, India Founded: 1844 (Debut of Written Documentation) Price: $0* Simple suspension bridges include living root bridges. They are created via the process of "tree-shaping," which involves directing a tree's (often Ficus elastica) roots over a river or stream. After that, you only have to wait for the roots to gradually get stronger. A live-root bridge may not be able to support human weight for decades.

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The most well-known of these bridges is the 164-foot-long Living Root Bridge, which is situated near Pynursla, India. The Double Decker Bridge in Nongriat Village is another well-known Living Root Bridge. The actual formation date of these bridges is unknown; nevertheless, in 1844, a British colonel wrote in his notebook of his "astonishment" at their expansion.