Everyone who possesses a mail address can vote for the Seven Wonders of Nature, until 11 - 11 - 11. It is expected that this campaign will see 1 billion votes cast from all over the world (against 100 millions in 2007). But before, that, 28 sites were selected from a list of 77 sites, which were taken from a larger list of 440 locations. The 28 "happy few" were chosen by a college of experts, chaired by Federico Mayor Zaragoza, the former director-general of UNESCO (there were also journalists, environmentalists, and even a wildlife cameraman). The sites are selected for their beauty, their ecological significance, and for their originality.

For example, the Cliffs of Moher were chosen for their unique shape, and because it is a remarkable area for seabirds.