Pont du Gard, France

Located in the south of France, the Pont du Gard is one of the finest examples of Roman Empire bridge-building. The Romans built bridges for all sorts of purposes, from pedestrian travel to trade to transporting water. The Pont du Gard aqueduct with its stone arches came in as the tallest at 160 feet, crossing the Gardon River when it was completed in the first century AD. With its three tiers of arches, the Pont du Gard serves as an example of impressive Roman bridge technique that served for centuries and stands tall to this day.