As an acid-free substance, hardboard is a viable medium for family portraits. Hardboard, a heavy type of fiberboard made from mechanical pulp, graces homes in the form of siding and more recently as artists' canvas. Hardboard comes in various finishes, thicknesses and types to mimic coarse chipboard, plywood or real wood.
Boeing Everett Factory. Largest usable space by volume. This building claims to be the outright biggest of the worldâs biggest buildings due to its mammoth volume. Some of the greatest planes ever built are assembled here, such as the wide-body Boeing 747, 767s, 777s, and the new 787 Dreamliner.
The Burj Khalifa, originally the Burj Dubai, is a supertall  skyscraper in Dubai, United Arab Emirates.   As of its topping out in 2010, it is the world's tallest buildinâ¦g,  and at 828 meters tall (2717 feet) it is in fact the tallest  manmade structure in the world.