The Medellín Metro (Spanish: Metro de Medellín) is an urban train that crosses the Metropolitan Area of Medellín from North to South and from Centre to West. As one of the first experiences of modern mass transportation in Colombia and the only metro system in the country, the Medellín Metro is a product of the urban planning of the Antioquia Department.
The city of Medellín and its urban complex (ten cities in the Aburrá Valley), had a relatively recent industrial development that started in the 1930s. The streetcar (tranvía) at the beginning of the 20th Century can be considered as predecessor of the 21st century Medellín Metro. The company known in Spanish as Empresa de Transporte Masivo del Valle de Aburrá – Metro de Medellín Ltda was created on May 31, 1979.