River Guadiana, seen from Ajuda Bridge.

Better saying, I stood on the remains of the bridge, built to provide access to Olivença, under Portuguese possession. The central arches collapsed during the floods of 1597; rebuilt in 1641, with draw bridges, it was destroyed in 1646 by the Spanish Army, during the War of the Restoration of Independence, and repaired after the end of the war. In 1709, during the War of Succession, the Spanish Army blew it up again, and remained in ruins ever since. Olivença became Olivenza, under Spanish rule, till today. A new road bridge was open in 2000, at expenses of Portugal, which never accepted the annexation of Olivença by Spain.
This is a view to the Portuguese riverside, part of Elvas council.