In the last five years China has been building an extensive network of railroads as part of a "New Silk Road." If the country goes through with its plans to build an undersea tunnel to America, China's network will become even more impressive. 

The plan is for a 125-mile tunnel, four times longer than the English Channel, connecting Eastern Siberia and Alaska via the Bering Strait. It would be part of a proposed "China-Russia-Canada-America" line that would run 8,000 miles long. 

This may seem ambitious, but China insists it has the technology. It also makes sense because the icy waters are notoriously difficult to traverse with ships. 

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[via Washington Post