• Tucson
  • Tibetan Autonomous Prefecture of Golog

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.

Guoluo Tibetan Autonomous Prefecture is an autonomous prefecture under the jurisdiction of Qinghai Province. it is located in the southeast of Qinghai Province in China, facing Gannan Prefecture and Huangnan Prefecture to the east, Aba Autonomous Prefecture and Ganzi Prefecture to the south, Yushu Prefecture to the west and Haixi Prefecture and Hainan Prefecture to the north; all are above 4200 meters above sea level, with a continental climate of the plateau. The state has a total area of 76400 square kilometers and has jurisdiction over six counties with a total population of 205700 in 2017. There are Animaqing Peak and Nianbaoyu Peak in Guoluo Tibetan Autonomous Prefecture; Zaling Lake and Eling Lake, which are called Baihai Shenhu Lake in ancient times, and the historical story of Tibetan-Han marriage; there are famous temples, ancient temples and cultural landscapes such as Laga, Baiyu, Chalang and so on. Because of its special geographical location and natural environment, the whole territory of Autonomous Prefecture is listed in the ── "Sanjiangyuan" Nature Reserve, the largest nature reserve in the country. two hundred and one
Travel Notes In Tibetan Autonomous Prefecture of Golog
Exploring the Source of the Yellow River and Observing the Niu Tou Monument——2020 Autumn Tibet, Xinjiang and Qinghai Self-driving Travel Notes (21)
I have known Li Bai's famous poem for a long time, "If you don't see the water of the Yellow River coming up from the sky, you will never return to th
2021 Autumn Travel Notes on the Qinghai-Tibet Plateau (4) - Guoluo
Guoluo Tibetan Autonomous Prefecture is one of the eight prefecture-level administrative regions in Qinghai Province. It is located in the southeast o
Impression of Hehuang丨The Back Garden of the Gods—Nianbao Yuze
The Yellow River has been a frequent visitor in the writings of ancient literati since ancient times From Li Bai's "If you don't see it, the water of
All the way to the west----Dongjicuona Lake, Animaqing Mountain
holy mountain lake 7DAY Today is the seventh day of travel, we approach Sichuan from the edge of Qinghai Province. Golmud --- Maqin (Donggicuona Lake