• Tucson
  • Tibetan Autonomous Prefecture of Hainan

Tucson (/ˈtuːsɒn, tuːˈsɒn/; Spanish: Tucson, O'odham: Cuk-Ṣon) is a city in and the county seat of Pima County, Arizona, United States, and is home to the University of Arizona. It is the second largest city in Arizona behind Phoenix, with a population of 542,629 in the 2020 United States census, while the population of the entire Tucson metropolitan statistical area (MSA) is 1,043,433. The Tucson MSA forms part of the larger Tucson-Nogales combined statistical area (CSA). Both Tucson and Phoenix anchor the Arizona Sun Corridor. The city is 108 miles (174 km) southeast of Phoenix and 60 mi (97 km) north of the U.S.–Mexico border. Tucson is the 34th largest city and the 53rd largest metropolitan area in the United States (2014).

Major incorporated suburbs of Tucson include Oro Valley and Marana northwest of the city, Sahuarita south of the city, and South Tucson in an enclave south of downtown. Communities in the vicinity of Tucson (some within or overlapping the city limits) include Casas Adobes, Catalina Foothills, Flowing Wells, Midvale Park, Tanque Verde, Tortolita, and Vail. Towns outside the Tucson metro area include Benson to the southeast, Catalina and Oracle to the north, and Green Valley to the south.

Tucson was founded as a military fort by the Spanish when Hugo O'Conor authorized the construction of Presidio San Agustín del Tucsón in 1775. It was included in the state of Sonora after Mexico gained independence from the Spanish Empire in 1821. In 1853, the United States acquired a 29,670 square miles (76,840 km2) region of present-day southern Arizona and southwestern New Mexico from Mexico under the Gadsden Purchase. Tucson served as the capital of the Arizona Territory from 1867 to 1877. Tucson was Arizona's largest city by population during the territorial period and early statehood, until it was surpassed by Phoenix by 1920. Nevertheless, population growth remained strong during the late 20th century. In 2017, Tucson was the first American city to be designated a "City of Gastronomy" by UNESCO.

Hainan Tibetan Autonomous Prefecture is an autonomous prefecture under the jurisdiction of Qinghai Province, adjoining Haidong and Huangnan Tibetan Autonomous Prefecture in the east, Haixi Mongolian Tibetan Autonomous Prefecture in the west, and Guoluo Tibetan Autonomous Prefecture in the south. The terrain is mainly mountainous across Qinghai Lake and Haibei Tibetan Autonomous Prefecture in the north, surrounded by mountains and centered in the basin, which is a typical plateau continental climate. The state has a total area of 44500 square kilometers and has jurisdiction over five counties; the permanent population is 476300 in 2018. Hainan Tibetan Autonomous Prefecture has undulating mountains, continuous rivers, dense forests and rich tourism resources. there are mainly national scenic spots such as Qinghai Lake, Riyue Mountain, inverted River, Longyangxia Hydropower Station, Heyin Town, Shenshan Ancient Temple Saizong Temple, Fujia Ancient City, Tongde Hebei Forest Farm, Zhihai Snow Mountain and other places of interest and natural landscape. Within the territory
Travel Guides In Tibetan Autonomous Prefecture of Hainan
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Travel Asks In Tibetan Autonomous Prefecture of Hainan