Work on a tunnel and rail system under the Bosporus Strait
connecting Europe and Asia in has just started in
Istanbul.  The tunnel will be 13.7 kilometres long, (8.5
mile) tunnel and 1,400 meters of the tunnel will be
underwater.  The Bosporus Strait, a 32 km waterway
connects the Black Sea and the Sea of Marmara, separating
European Turkey from Asian Turkey.  It bisects Istanbul
as it flows by historic Ottoman castles, mosques and
parkland.  The tunnel will become the third link between
the city's European and Asian sides.

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