Original sentence: By October 2006, the list had been narrowed down to 21 sites (how these 21 sites were chosen is not revealed).The project began in early 2006 as a list of 200 existing monuments chosen from a pool of World Heritage Sites, the only criteria being only landmarks which were built or discovered before the year 2000.These 21 sites went into a voting phase overseen by the Swiss entity "New7Wonders", which specialises in the promotion of monuments.Votes were available for sale from the NewOpenWorld Corporation (NOWC) to any individual or country, and, as explained in its Terms and Conditions, NOWC "reserves the right at its absolute discretion to exclude votes" made by the public
Edited sentence: By October 2006, the list had been narrowed down to 21 sites from around the world, including the Taj Mahal in India, the Great Wall of China, and Machu Piccu in Peru.The project began in early 2006 as a list of 200 existing monuments recognized by UNESCO, the only criteria being that only landmarks which were built or discovered before the year 2000 were eligible.These 21 monuments went into a voting phase overseen by the non-profit Swiss foundation New7Wonders, which specialises in the preservation, restoration and promotion of monuments.UNESCO, which already maintains a list of World Heritage Sites, is reportedly treating the list seriously and plans to designate the chosen monuments with special recognition and status.Voting certificates may be purchased from the NewOpenWorld Corporation (NOWC) by any individual, but, as explained in its Terms and Conditions, NOWC "reserves the right at its absolute discretion to exclude votes" made by the public