Incidente de Palomares Historical milestone · Cuevas del Almanzora, Levante Almeriense, Almería On the 17th of January 1966, the mid-air collision of two American aircraft over the hamlet of Palomares released radioactive material from four thermonuclear bombs, one of the most significant nuclear incidents of the Cold War on European soil. Photo: U.S. Navy, Courtesy of the Natural Resources Defense Council (Public domain) What to see and do in Cuevas del Almanzora