The Alcántara Bridge ( also known as Puente Trajan at Alcantara ) is a Roman stone arch bridge built over the Tagus River at Alcántara , Spain between 104 and 106 AD by an order of the Roman emperor Trajan in 98 .
Alcántara Bridge ( also called Puente Trajan at Alcantara ) is a Roman stone arch bridge . It was built over the Tagus river , Alcántara , Spain between 104 and 106 AD .