This is the point where the Yellow River (or Huang He/Hwang Ho) enters the Bohai Sea.
As the Yellow river is the most sedimented river on earth, the delta is an ever changing piece of wetlands. The Earth Observatory site of Nasa has an interesting set of pictures of the changes in the last 20 years.
Correct answers from:
- Milosh, Serbia +
- David Kozina
- José Diaz
- Rolando Marín Monge
- Andy M, USA
Milosh, Serbia found it before the hint was out.