These are the world's 12 longest tunnels
Business Insider -

For centuries, mountains and lakes posed massive problems for engineers. 

In both cases, they make travel nearly impossible and can make trips longer by days or months to bypass obstacles. 

However, with the invention of Marc Isambard Brunel and Thomas Cochrane's invention of the tunneling shield in the 19th century, that all began to change. Tunnels could go deeper — underwater through bedrock — allowing for quicker travel times. 

From particle accelerators to portals through Switzerland's...

Read this story at

Loading...

Related Articles