Wiki Loves Monuments 2011 was a photo contest regarding National Heritage Sites in Europe. There is a central European website for participants, with separate websites per participating country. The comprehensive project portal is on Wikimedia Commons and the winning photos per country are here.
Update February 9th, 2012:We are well into 2012 now and plans are warming up for WLM 2012, but the WLM 2011 project is just starting for the English Wikipedia here. Please consider browsing all of the winners from WLM 2011 for all participating countries, and creating article stubs or adding pictures to formerly pictureless articlies. After all, the whole idea behind WLM is to be able to illustrate Wikipedia in all languages! Please also join the discussion how the English Wikipedia should prepare for the new load of images that the Wikimedia Commons project will harvest in September 2012.
Update September 6th, 2011:We have passed the 15,000 milestone in numbers of uploads in just 5 days - thanks to all photographers (or their devoted following of upload-helpers)!!!!
Update September 16th, 2011:We passed the 50,000 milestone and helped push Commons over 11,000,000 files yesterday! What will the last half of the month bring? This is an amazing result and a warm welcome to Russia, who starts their national competition this week.
Update September 21st, 2011:We passed the 75,000 milestone yesterday - and Russia has already uploaded over 1,000 photos in less than a week!
Update September 27th, 2011:We passed the 100,000 milestone on Sunday (Signpost coverage) and five countries already have over 10,000 uploads!
Update October 1st, 2011:We passed the 165,000 milestone last night thanks to a rumor about breaking the Guiness book of world records on most photo's sent in to a photo contest! The average number of uploads per user went up from 17 to 30 - what an amazing sprint!