The Iguaru Falls of Argentina and Brazil leads the voting, followed by the Great Barrier Reef of Australia, Papua New Guinea and Komodo of Indonesia.

The final voting stage will take place between 2010 and 2011. During this time, the New 7Wonders World Tour will visit all 21 sites. The New7Wonders of Nature will be unveiled in the summer of 2011.

To vote for Halong bay, twice recognised by the UNESCO for its landscapes and geological values, please visit the website www.new7wonders.com/nature/en/vote_on_nominees/