At the height of his power, Pablo Escobar’s Medellín Cartel reportedly generated hundreds of millions of dollars every week. So much cash was hidden in warehouses, walls, and remote locations that enormous sums were reportedly lost to moisture, decay, and rats. Facing the threat of extradition, Escobar even offered to help pay Colombia’s national debt in exchange for avoiding prosecution abroad. His reign finally ended in 1993, when Colombian security forces tracked him down and killed him in Medellín.