The Isle of Man has a rich transport heritage and boasts the largest narrow gauge railway network in the British Isles with several historic railways and tramways still in operation. These operate largely to what is known as "Manx Standard Gauge" (3 ft (914 mm) narrow gauge) and together they comprise about 65 miles (105 km) of Victorian railways and tramways. A railway museum in Port Erin allows people to find out more about the history of the Manx railways, and was until the late 1990s accompanied by a similar museum in Ramsey, which was dedicated to the history of the electric line, but this was closed and converted into a youth club. The steam railway to the south of the island, electric to the north, and mountain line to the summit of Snaefell, the island's only mountain, are all government-owned, and operated under the title "Isle Of Man Railways", as a division of the island's Department Of Tourism & Leisure. The lines at Groudle Glen and the Wild Life Park are both privately owned but open to the public.