Only Seven Wonders?

Demonstrating democracy in action less than 1/10th of 1% of the worlds population have so far voted an average of 7 times each to select a new list of the Seven Wonders of the World. The Washington Post has pictures of the 21 nominees.
It might, though, be more appropriate to call it a list of the seven man-made wonders of the world. Certainly it is perfectly fine for us to identify some number of human artifacts that exemplify the height of human ingenuity, creativity or engineering skill. All the candidates are impressive and possibly deserving from this perspective.
However, none of them hold a candle to many other wonders of the world. A few examples:

  • The natural backdrops of Machu Picchu (Picture 3) or Sao Paulo (Picture 4)
  • Tubeworms and Spider Crabs or any other living or extinct life form
  • Pick your favorite mountain
  • Pick your favorite river

And so on.
NB: With respect to the 3rd picture are people voting for the statue, the water faucet or the remarkable natural setting?

Via The Volokh Conspiracy.