The Valley of the Fallen is a monumental site located near Madrid, Spain. It was constructed between 1940 and 1959 to honor those who died during the Spanish Civil War. The site features a large basilica and a towering cross, which stands at 150 meters, making it one of the tallest crosses in the world. The valley is also known for its controversial history, as it serves as the burial place for many soldiers, including those from the Nationalist side led by Francisco Franco. The site has been a focal point for discussions about Spain's historical memory and the legacy of the civil war.