Puente romano de Alcántara Monument · Alcántara, Comarca de Alcántara, Cáceres Bridge over the Tajo river, traditionally dated to 103-104 AD under Emperor Trajan according to its dedicatory inscription, although some authors debate this attribution. It is 194 m long and 58.2 m high, with six unequal arches (the central one spans 28.8 m) and a 14 m-high triumphal arch on its axis. It suffered demolitions during the War of the Spanish Succession (a Portuguese attempt in 1707, repaired under Carlos III in 1778), the War of Independence (an arch was blown up in 1809 to hold back Napoleonic troops, replaced by a wooden footbridge until 1836), and the First Carlist War (that footbridge was burned in 1836); the architect Alejandro Millán rebuilt the arch for good between 1858 and 1860 under the reign of Isabel II. It was declared a Monumento Nacional on August 13, 1924. A new bridge, opened on October 20, 2025, has taken over vehicle traffic from it. 103-104 d.C. (construcción tradicional); 13 de agosto de 1924 (declaración de monumento nacional); 20 de octubre de 2025 (apertura del nuevo puente y peatonalización) Photo: Dantla from de.wikipedia (GFDL) What to see and do in Alcántara