The Bergen Railway is a railway line in Norway that connects the cities of Oslo and Bergen. It is the highest mainline railway line in Northern Europe, with the highest point at 1,237 metres (4,058 ft) above sea level. The railway is a popular tourist attraction
From Wikipedia
The Bergen Line, or the Bergen Railway, is a 371-kilometre (231 mi) long scenic standard gauge railway line between Bergen and Hønefoss, Norway. The name is often applied to the entire route from Bergen to Oslo, including the Randsfjord and Drammen lines between Hønefoss and Oslo, covering a total distance of 496 kilometres (308 mi). It is the highest mainline railway line in Northern Europe, crossing the Hardangervidda plateau at 1,237 metres (4,058 ft) above sea level.