The Subte is the underground metro system in Buenos Aires, Argentina. It is one of the oldest subway systems in the world, having opened in 1913. The Subte consists of six lines, identified by letters and colors, and serves millions of passengers each year, providing a fast and efficient way to navigate the city. The Subte is known for its affordability and extensive network, connecting various neighborhoods and key locations. It operates daily, with trains running frequently during peak hours. The system is an essential part of public transportation in Buenos Aires, helping to reduce traffic congestion and pollution.