Turkey tests undersea rail tunnel linking Asia with Europe

Marmaray_projectIstanbul’s European and Asian sides, the first of several planned mega projects in the country’s largest city to see the light of day. The 13.6 km (8.5 mile) tunnel, including a 1.4 km immersed tube tunnel – the deepest of its kind in the world at 56 metres – passes under Turkey’s Bosphorus Strait, the busy shipping channel linking the Marmara Sea to the Black Sea.