The Wind breathes life, and can very well just as fast take it away. The Shinobi of the Current are as fast as the quickest gale, and can finish off opponents just as swiftly. Don't blink, or you will be thrown into the unmerciful torrent of the Wind. (Kazekage)
This the non-civilian zone of the village. It basically has all the training grounds as well as the hidden ANBU headquarters and the military medical center. Plus more shinobi-exclusive facilities.