[7 Record-Setting Engineering Wonders of the Modern World]Boston, Massachusetts: The so-called Big Dig

 

 

 

 

 

 

 

 

 

Boston, Massachusetts: The so-called Big Dig is a massive tunneling project in the heart of Boston, and is the most massive and expensive construction project in the history of the United States (at 15 billion dollars). Disaster and scandal have haunted this endeavor from the beginning, including accidents, deaths and even arrests for criminal negligence. Engineers were forced to navigate a maze of subways, pipes and utility lines in the course of the project, all with minimum disturbance to the bustling streets of Boston above.