Kraków-Kolna Canoe Slalom Course

The Kraków-Kolna Canoe Slalom Course is an artificial whitewater course in Poland, on the south bank of the Vistula River, in the suburb of Kolna, 10 kilometres west of Krakow. It is fed with river water diverted around a nearby dam. The top 120 metres of the course is a flatwater start pool that is covered in winter by a long white tent. Air inside the tent is heated, but the water is cold.

This Olympic-standard slalom course is the site of frequent international competitions. In June 2013, it hosted the European Championships. It is part of a larger complex called the Kolna Sports and Recreation Center which includes a canal for flatwater sprint canoeing and an indoor gymnasium and swimming pool.

Source: Wikipedia