I’ve always been fascinated by engineering, and love this bridge in central France, nearly 25 miles long, the longest in the world, and built for less than half its anticipated cost.
Here are few other wonderful bridges.
Ribblehead Viaduct, North Yorkshire, England.
I am not sure where this is, but it might be Mexico or South or Central America:
Landwasser Viaduct, Switzerland:
Ancient bridge, Isfahan, Iran (Persia)