We carved slides into the earth, built multiple pools, and created a full water park—all underground and made by hand.

With my partner recovering, I take on the challenge of building a peaceful underground mud home completely solo—using only natural materials.

It was the first armed air escort exercise employing helicopters, the U.S. Navy Submarine Group 9, which exercises administrative control authority for assigned submarine commands and units in the ...

Catherine Austin Fitts, who worked under the first Bush administration, claimed the US has built secret underground cities.

A new exhibit at the U.S. Navy Memorial’s visitor center, which acts as a quasi-museum, uses interactive screens and a model ...

About 2,500 workers at submarine builder Electric Boat shipyard in Connecticut plan to strike on May 18 if a tentative ...