Bridges

Civil engineering's most dramatic form — log across a stream to mile-long cable-stayed mega-structures, with a spectacular collapse or two along the way.

3 posts· 2900 BCE – 50 CE

• The Pont du Gard, or how Rome moved a river across a gorge 50 CE
• The Arkadiko bridge, or the oldest arch still standing 1300 BCE
• The bridge at Girsu, or the world's oldest crossing 2900 BCE