Lhasa is the only way which must be passed

Travel to tibet, Lhasa is the only way which must be passed. It is rightly one of the most featured and dreamt-about cities in the world. This is not only because of its high altitude at 3,650 meters (11,975 feet) which means remoteness and limited accessibility, but also because of its over 1,000 years' cultural and spiritual history which leaves an impressive heritage that has helped to create the romantic and mysterious Tibetan religion. And it is the terminal station of Qinghai Tibet Railway.
As the beautiful capital city of Tibet Autonomous Region (TAR), Lhasa is situated in the South Central part of the region, on the North bank of the Kyichu River (Lhasa River) in a mountain-fringed valley. This ancient sprawling city, settled 1,300 years ago, covers 30,000 square kilometers (11,583 square miles), with a population of 400,000, of which 87 percent are Tibetans. The urban population is 180,000.
Generally the period from March to October is the best time to have Tibet travel. Since Lhasa is located at such a high altitude it is wise to be prepared before starting your journey. Generally speaking, due to the large temperature differences during any given day in Tibet, warm clothes should be taken to keep away the cold. However, because it also receives a great deal of sunshine, sunglasses, suntan oil, and a sun hat are indispensable items if you're traveling anywhere in Tibet. Lhasa tours and Everest Base Camp Tour are most popular in tibet tours.