Ming Tombs:

See the steep gradient in the pics below:
Badaling section of the Great Wall Of China, which is closest to Beijing and apparently, better maintained to climb. However, the climb is pretty tough with long steps in some sections and just high gradient plain floor in some sections. It is worth the experience. No wonder Great wall of China is one of the seven wonders of the world.
See the steep gradient in the pics below:
Skyscrapers from my hotel window:
All the above pictures were taken in my 5megapixel iPhone4.
Please feel free to use them.