What enables a simple arch bridge to support such great weight? What holds up a suspension bridge? Bridge the world with award-winning author-illustrator, and captivating storyteller, David Macaulay, and meet the brilliant designers who dared to extend roads and railways with ingenious but sometimes flawed designs. From the Golden Gate Bridge to some of the world's groundbreaking spans, you'll explore dozens of monumental engineering feats through historic film footage, fascinating photographs, illustrations and dramatic recreations.

Special features: printable materials for educators and parents ; access to the Building big Web site.