Tucson is a city in Arizona. It is the second largest populated city in Arizona. Also it is the administrative seat of Pima district of the country. The renowned University of Arizona is also located there. It is also popularly known as Optics Valley. It is attributed to significant contribution of local companies in the designing and manufacturing of the optics. The city is positioned in the wide valley of Santa River. It is also sometimes referred to as the ‘City of Sunshine’. Tucson is bordered by high hills. Presence of countless tourist spots invites millions of visitors to the city every year.