The Metro de Lisboa is the rapid transit system serving the city of Lisbon, Portugal. It consists of four main lines, identified by different colors, and covers approximately 45 kilometers. The metro connects key areas of the city, making it a convenient option for both residents and tourists. Opened in 1959, the metro has expanded over the years to include 56 stations. It operates daily, with trains running frequently, providing an efficient way to navigate Lisbon's urban landscape. The system is known for its cleanliness and safety, making it a popular choice for public transportation.