qinghai-tibet railway

approaching architecture asia asian background blue china chinese cloud clouds cloudy commute commuting conduit construction converge curve curved diverge electric fast grass grassland green highland highlands industrial iron journey landscape lanes line lines made metal mountain mountains network outdoor outdoors outside passage path perspective plateau pole power powerline prairie public qinghai rail railroad rails railway rock rocky security signal sky speed spore station steel straight structure summer tableland technology tibet track train transit transport transportation travel tube tunnel urban wire