A brand new tunnel set to connect Denmark to Germany is underway. The 11-mile long passage is costing a huge $7.9 billion but ...

The massive project aims to help residents in New York and New Jersey get from place to place safely for decades.

Today, L.A. Metro’s subway tunnels connect some of the city’s most densely populated neighborhoods. There are many other ...

You learned from the previous three columns that Troy had a bustling Railroad life until the late 1950’s. Those of us growing ...

or an underground space. Surprisingly, there are no driving or railroad tunnels in the San Bernardino Mountains, but there is a fascinating and historic water tunnel built in the early 1900s at ...