Elon Musk's Boring Co. selected three new cities to build underground tunnels: Dallas, Baltimore and New Orelans.

"Whether it is feasible or not, we’ve opened the door for conversations that could lead to opportunities," said Mayor Helena ...

UPPER FREEHOLD TOWNSHIP, N.J. (CBS) - The New Jersey Department of Environmental Protection (NJDEP) is building wildlife tunnels underneath roadways to prevent cars from hitting and killing animals.

An underground tunnel linking the mostly demolished Henry A. Wallace Building to the Capitol and other state offices is being closed but not torn down. Why it matters: The link is potentially valuable ...