Tibet is a plateau region in Asia, north-east of the Himalayas. It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as MonpasQiang, and Lhobas, and is now also inhabited by considerable numbers of and Hui people. Tibet is the highest region on earth, with an average elevation of 4,900 metres (16,000 ft.).
Of all the Tibetan areas in China, the TAR is a special case. Along with a visa, foreign visitors are officially required to have a permit issued by the PSB to enter the province. Without it, you'll be unable to buy air or bus tickets. However, you don't have to worry about where and how to get these permits. If you take common routes, such as Chengdu - Lhasa (Air) or Kathmandu Lhasa foreign travellers must buy both the permit and the ticket together through a travel agency who provide the travel permit.
Lhasa City tour is yet another popular package to the Holy city of Lhasa in Tibet. Lhasa, the capital of the Tibet Autonomous Region is a historically worthy town dated back to more than 1300 years in the history of Tibet. The city of Lhasa is located between 29o 36'N and 19o 06' E at an altitude of 3650 meters above sea level towards the northern bank of Kyichu river. Lhasa city tour is also popular because the city of Lhasa has been the hub of politics, economy, culture and religion in Tibet.