A worker holds a cat in the Marmaray Tunnel under the Bosphorous

Istanbul (AFP) – Turkey will on Tuesday unveil the world’s first sea tunnel connecting two continents, fulfilling a sultan’s dream 150 years ago, but also fuelling recent anti-government sentiment for such mega projects.

“Our ancestors worked on (the project). It fell to us to realise it,” said Turkey’s Prime Minister Recep Tayyip Erdogan of the rail tunnel under the Bosphorus linking the European and Asian sides of the bustling city of Istanbul.