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The ancient Romans used an impressive variety of structures in their… | 
The use of tunnels, high bridges over valleys, or inverted siphons… |
Pont du Gard carried drinking water across the Gardon River Canyon to… | 
The water channel on top of Pont du Gard was covered to prevent… | 
"Pont del Diable" carried culinary water to Tarraco, modern-day… |
This impressive Roman aqueduct bridge is located in Segovia, Spain… | 
Below 50 meters, the Romans crossed a valley by bridging it, above… | 
The Roman water system at Aspendos (south-central Turkey) employed… |
