Castuera II (Concentration Camp), Badajoz (2016). The Gamonita mine shown here and other mines around the concentration camp are believed to contain hundreds of people, disappeared from April 1939 to March 1940.Llano de Maja (El Teide), Tenerife (2017). Francoist militias murdered more than 400 people on the island after 18 July 1936. An undefined number of ‘disappeared’ are believed to have been thrown into caves around the Llano de Maja within the Teide National Park.