Herzog & de Meuron's famous Bird's Nest Stadium http://en.beijing2008.cn/venues/nst/ in Beijing. I gave away several copies of this to my friends and clients when I arrived in China for the Olympics and people loved it! However, friends who have seen it outside of the Olympic Games context do not always know what to make of it. I have had a lot of people turn it on its side and say, "oh, is this a butterfly?"

Read more about the Bird's Nest at http://en.wikipedia.org/wiki/Beijing_National_Stadium.