The city of Istanbul has commenced studies to examine the feasibility of an underwater tunnel for cyclists and pedestrians that links Asian Turkey to European Turkey.

The two-kilometre-long tunnel is planned to be 20 metres below the sea and span the narrow Bosphorus strait which splits the Turkish capital.

The tunnel will have two levels. The upper level will be covered with plants and bushes and include infrastructure for cyclists and pedestrians.

This includes a moving walkway that will allow people to walk directly between Üsküdar and Kabataş metro stations.