Perşembe, 14:00

Supertunnels

To overcome oceans and mountains which separate us from our neighbours, engineers have dug tunnels once thought impossible. We visit the sites of three vast tunnel projects. In 1871, Mont-Cenis built the first tunnel through the Alps. Work was supposed to take up to 30 years, but the new pneumatic drill broke all the records. On its opening in 1994, the Euro tunnel was the world's longest under-sea tunnel. Last, but not least, the 1965 Mont Blanc Tunnel, the longest road tunnel of its time.