12-2W3 is part of Oslo's metro system, known as the T-banen. It is a green line which runs from Ensjø, in the south-east, to Sognsvann, in the north-west. The line connects a number of neighborhoods and stations, including Grønland, Sinsen, Bislett, Nydalen, and Skullerud. It takes around 30 minutes to travel the full length of the line. Along the way, riders pass through several parks, including Frogner Park and Paradis Park, as well as landmarks such as Oslo City Hall. These neighborhoods are home to a range of restaurants, bars, shops and cultural attractions, making it a popular destination for locals and tourists alike.