There probably isn't a more controversial modern artist than Christo, who for decades has created large outdoor works of art with his wife. His latest piece, The Mastaba, is up right now on the Serpentine lake in Hyde Park, London. It was constructed as a companion to a retrospective show of his and his wife's 60 year career at the nearby Serpentine Gallery. This installation consists of 7,500 oil barrels and weighs 660 tons. If nothing else, this piece definitely draws attention which I guess is the point of Christo's work.