Prüm explosion

On 15 July 1949 an ammunition depot exploded on the hill of Kalvarienberg in the Eifel mountains, in West Germany near the border with Luxembourg. The cause of the explosion, in which the town of Prüm was heavily damaged and 12 people killed, was never discovered. The crater, which is still visible today, is one of the largest man-made explosion craters in existence. A cross on the Kalvarienberg commemorates the victims of the disaster.