Christo, the famed Bulgarian artist best known for huge stunt art pieces, is about to top himself again. "The Mastaba" will stand 492 feet and will be built in the desert outside of Abu Dhabi. Once constructed, the world's biggest permanent sculpture will stand taller than The Great Pyramid, and will be made of 400,000 different colored oil drums. The project should take 30 months and cost over $325 million dollars! That's a lotta art out there!