Man-Made Wonders: Bridges presents a hand-picked selection of seventy-five of the most most impressive, ambitious, humble, historic, eccentric, extravangant, expensive, and beautiful bridges and viaducts from locations across the globe. You will find every major type of bridge, from simple rope walkways stretched across ravines; ancient arched stone structures built without mortar by the Romans, almost two thousand years ago, aand still usable. To the newest technologies with ultra-modern construction.