The Metro de Barcelona is an extensive underground train system that serves the city of Barcelona, Spain. It consists of 12 lines, identified by colors and numbers, covering approximately 150 kilometers and over 180 stations. The metro is a key component of the city's public transportation network, providing efficient access to various neighborhoods and attractions. Operational since 1924, the Metro de Barcelona is known for its punctuality and cleanliness. It operates from early morning until midnight, with extended hours on weekends. The system is user-friendly, featuring clear signage and announcements in multiple languages, making it accessible for both locals and tourists.