This is just a limited selection of some of the most impressive an interesting events from over 12,000 UFO Italian cases CUN has in its files and occurred in Italy during the 20th century. Apart from conventional UFO sightings and close encounters of the first kind, in particular CUN investigated at least 1,000 Italian close encounters of the second and third kind and abduction cases, showing the constant, intelligent and alien nature of UFO phenomena also in our Country. This first volume draws no conclusion about the specific nature and intent of the non-terrestrial entities controlling UFOs. We shall try to do this, as far as possible, at the end of the second volume of this book.