Several vehicles were damaged Friday when concrete debris fell from the ceiling of a Boston tunnel, resulting in considerable ...

Traffic was snarled in the Prudential Tunnel Friday afternoon after a large chunk of concrete fell from the roof of the busy ...

Thought to have been built sometime between 800 and 1100 AD, around 2,000 Erdstall tunnels can be found across central Europe, particularly in Bavaria, where there are over 700. With only one way in ...

A decade after it was first revealed, London's "super sewer" is now finally complete. The £5 billion (US$6.3 billion) project ...