The Carlos Fernández Casado Bridge is located in the province of León and is part of the AP-66 highway in Spain; for several years, it was the bridge with the longest span in Spain, measuring 440 meters in length.
The The length of this cable-stayed structure is about 643 meters and has four lanes for vehicle traffic. The bridge, which crosses the Barrios de Luna Reservoir, is divided into three openings. The It is 22 meters wide.

Construction, which began in 1979, was completed four years later, in 1983. The bridge was designed by the renowned engineer Javier Manterola and was built using the cantilever method.
The towers of the Engineer Carlos Fernández Casado Bridge have a about 123 meters high. There is a hinge in the center of the main opening.

It was the bridge with the longest span in Spain—440 meters—until the La Constitución de 1812 Bridge was opened.