The opening ceremony of the Olympic Games in Paris on July 26 will use the River Seine and the natural light of the setting sun to create a memorable spectacle, chief Games organizer Tony Estanguet said on Friday. For the first time in the history of the Olympics, the opening ceremony will not be organized in a stadium, but in the heart of the host city. Around 160 boats will take the several thousand athletes on a six-kilometre route down the Seine and past some of the most famous sights in Paris from the Pont d’Austerlitz to the Eiffel Tower. A total of 12 artistic productions are planned al…