Ancient Roman bridges were remarkable engineering feats that showcased the Romans' advanced construction techniques. Built primarily from stone and concrete, these bridges often featured arches, which allowed them to span wide gaps and support heavy loads. Many of these structures, such as the Pont du Gard in France, were designed to carry not only foot traffic but also vehicles and water through aqueducts. The Romans constructed bridges throughout their vast empire, facilitating trade and military movement. Some famous examples include the Ponte Milvio in Rome and the Alcantara Bridge in Spain. Many of these ancient bridges still stand today, demonstrating the durability and ingenuity of Roman engineering.