China's Plan to Dig the Longest Tunnel Ever.

China plans to build the longest underwater tunnel ever, a 76 mile connection linking two bustling northern ports...but at a price of $42 Billion, the need to cross two active fault-lines, and being nearly 3 times deeper than the chunnel, is it too ambitious?

http://qz.com/103187/china-plan-to-build-bohai-undersea-tunnel/