The Guadiana International Bridge is a cable-stayed bridge that crosses the Guadiana River between the city of Ayamonte in Spain and the city of Castro Marim in Portugal. It is the southernmost border crossing between Portugal and Spain.
In the 1960s, they started looking at the possibility of a bridge on the site. The bridge opened in 1991.
The bridge is 666 meters long and the largest span is 324 meters. It is the third largest bridge in Portugal and the fifth largest in Spain.
