At first glance, you may think that you're looking at a real-life Mario Kart stage, but it's actually a famous 65-foot tall snow corridor in Japan, called the Tateyama Kurobe Alpine Route. Continue reading for a video, more pictures, and additional information.
Murodo-daira of Tateyama has one of the heaviest snows in the world, and the snow reaches about seven meters (23 ft) on average. In particular, the snow mantle at Otani, a five-minute walk from Murodo Station, sometimes gets more than 20 meters (65.6 ft) because of snowdrifts. The famous "Snow Walls" are formed by expelling this heavy snow, and the 500-meter-long area with such snow walls is open to sightseers from mid-April to late May.
[Sources 1 | 2]