a four-mile multi-purpose underwater tunnel, will cross the Bosphorus River - a natural strait located in Turkey’s largest city which connects the Black Sea to the Sea of Marmara and forms one ...

Authorities say the man had built two 6-foot-deep holes in the sand when he tried to connect them with a tunnel that afternoon. But by the time he tried to connect the two, the sand had dried and ...

A giant boring machine has "broken through" to complete the initial construction phase of the £100m Shieldhall Tunnel. The project to create the biggest ... make the tunnel made the breakthrough ...

The completed section of tunnel has a diameter of 55.8 feet (17 meters), and it has 500 pipe rings of underwater shielding.

Tunneling through soft sand is a tricky business! Choose a tool or technique below, and try to figure out the best way to dig a shallow subway tunnel through this loose, shifting ground!