In the last years of the 18th century, the world's first indoor stadium was opened, it was in Montreal. Bad weather, rains clearly did not dispose to attend matches, so the idea of creating a "roof" over the stadium was born. But bad weather does not reign everywhere; the opposite situation also happens. In such countries, open areas are most often built. This is how open-air tracks are also built for "winter" disciplines - ski slopes, bobsleigh and snowboard tracks. But the benefits of an indoor stadium are still invaluable. Therefore, enterprising builders are erecting stadiums with sliding roofs to adapt to any weather.