Deepest Tunnel
The Marmaray Tunnel is a 13,5 km (8,4 mi) long undersea railway tunnel in Istanbul, beneath the Bosporus strait, linking Europe with Asia. Tunnel consists of two single track tunnels and was... Read allThe Marmaray Tunnel is a 13,5 km (8,4 mi) long undersea railway tunnel in Istanbul, beneath the Bosporus strait, linking Europe with Asia. Tunnel consists of two single track tunnels and was opened to passenger traffic on 29 October 2013.The Marmaray Tunnel is a 13,5 km (8,4 mi) long undersea railway tunnel in Istanbul, beneath the Bosporus strait, linking Europe with Asia. Tunnel consists of two single track tunnels and was opened to passenger traffic on 29 October 2013.