Acámbaro is a city and municipality in the southeastern corner of the Mexican state of Guanajuato, on the banks of the Lerma River, and the oldest of the 46 municipalities of Guanajuato. Acámbaro is noted as a major railway junction, a local transport hub, and the origin of the nationally famous Acámbaro bread. Its greatest claim to world fame is being the source of the Acámbaro figures, a purported archaeological forgery.