Stretching across the Toyama and Nagano prefectures north of Tokyo, the 90-kilometre sightseeing route – dubbed the "Roof of Japan" – offers incredible views of the 3,015-meter Mount Tateyama and 2,478-meter Mount Akazawa-dake peaks, while providing access to everything from Japan's highest altitude hot spring to the country's highest waterfall. But the route's biggest attraction is the snow walk, which takes around 20 minutes to traverse and will remain open until 25 June. [...] The tourist attraction results from months of strenuous work by snowplough drivers who carve through the snowed-in Tateyama Toll Road. The opening of the Yuki no Otani walk also marks the resumption of traffic through the entire Tateyama Kurobe Alpine Route at the end of winter. Other attractions in the area include a separate Panorama Road, which gives trekkers better views of Mount Tsurugi, part of the Tateyama range. This one is only open until 7 May.