I am interested in stealth technology so this article from Discovery Channel Magazine March 2009 is eye catching. It contains an interesting article by Chris Davis on a warrior's ultimate goal of being invisible using plasma clouds, radioactive paints, light-bending cloth dealy silent power plants.
What you can't see can kill you!
There is also an interesting article about Herod's Triumph
King Herod wanted to build a major trading city in Judea, but there was no harbour. So he built a massive artificial one, the remains of which still stand some 2,000 years at Caesarea.