As a result, many people in America's largest cities rely on various forms of public transit to get around town, whether it ...

It provides consistent output and can lower energy bills. Major city set to tap into limitless underground energy source — ...

A fatberg described as equivalent in size to a blue whale - the largest animal known to have existed - has been removed from ...

Credit: Youtube Helsinki’s underground city, built into solid bedrock, includes gyms, shops, and even a church. It’s designed to house 600,000 people in an emergency.

Officials have announced construction of the Music City Loop, an underground tunnel project by Elon Musk’s Boring Company, ...