The Stockholm metro, known as Tunnelbana, is a rapid transit system serving the city of Stockholm, Sweden. It consists of three main lines and over 100 stations, making it one of the longest metro systems in the world. The metro is known for its efficiency, connecting various neighborhoods and suburbs to the city center. Opened in 1950, the Stockholm metro features unique artwork at many stations, showcasing the city's commitment to culture and design. The system operates daily, providing a reliable mode of transportation for both residents and tourists exploring the beautiful city of Stockholm.