The village takes its name from the Latin ordinal numeral "nonus", with reference to the nine Roman miles that pass between Nus and Aosta; however, it is a place not only notable because of its proximity to Aosta but also for its many Roman and medieval remains. We warmly recommend Fénis castle for a day trip and also the Saint-Barthélemy astronomical observatory, where stars are accessible to both astronomy lovers and to the simply curious. Finally, enjoy the traditional cookies "Baci di Nus", produced by the local pastry shops: they will certainly leave you a sweet memory of your holidays in Aosta Valley!