Roman bridge near Jerez de los Caballeros, Extremadura. Still open to all traffic and no weight limit posted.
Also Roman, close to the other one, but up a dirt lane and little used.
Puente Mayorga, Cádiz, a km or two inland from Gibraltar. The medieval bridge was augmented by a flat reinforced concrete job alongside a decade or four ago. In a nice ironic twist, the old bridge is still open to traffic, controlled by traffic-lights, while the younger sibling is now limited to pedestrians and bikes.
This one leads to the beach. Ahead the view is across the Bahia de Algeciras, but right behind is the refinery that General Franco allegedly put there so the smell and pollution would blow across Gibraltar.
Compare and contrast. Looking seaward and looking inland from the same spot. (Please excuse lack of bridginess)
A mile or two later came close to this over the Guadarranque. It carries pipes between the oil refinery and a chemical works. It's not open for the public to cross.
Asymetric cable stayed foortbridge, Fuengirola
Slightly bizarre footbridge upstream
But it's closed, gates welded shut
Three for the price of one: Puentes Puerta Palma, Universidad and Real over the Guadiana
A couple of off-the-beaten-trackers, somewhere in hidden SW Spain