Photo taken on April 16, 2012 shows a giant sand castle on Weymouth beach to mark the 100-day countdown of the 2012 London Olympic Games. Beginning Wednesday, April 18, the date that marks 100 days from the July 27 Opening Ceremony of the 2012 London Olympics. Weymouth and Portland will host the Olympic and Paralympic sailing at the 2012 London Olympic and Paralympic Games. [Xinhua]