The Morrow Royal Pavilion in Las Vegas is the world's largest structure made from recycled beer bottles. Over half a million beer bottles were crushed and turned into a composite material called GreenStone that was used to construct the 30,000 square foot manufacturing facility. GreenStone is created by crushing beer bottles into grains, mixing them with fly ash, and letting the material dry into molds. The building project saved the equivalent of eight football fields worth of landfill space.