It was my dream to travel on the roof of the world. Very little action was taken until the Tibet Railway was built. Chinese people call the Qinghai-Tibet Railway the Sky Railway. It is the rail road at highest elevation in the world. This web site is the diary of my trip. I would share the information with whom wishes or wants to take the similar trip. Hopefully, the information I provide will be helpful. To whom cannot go or does not want to tolerate the 60% of the regular atmosphere pressure in Tibet, I hope you will enjoy this web site, too.