Alcazaba árabe de Mérida Monument · Mérida, Tierra de Mérida - Vegas Bajas, Badajoz Built in 835 by order of Abd al-Rahman II, it is considered the first Arab alcazaba built on the Iberian Peninsula. It is a quadrangular fortification 130 m on each side, next to the Roman bridge. Photo: Doalex (CC BY-SA 3.0) What to see and do in Mérida