Bypass Canal is the largest in our city and was built to protect against floods He began digging in 1769 and finished only 10 years later, but he was unable to save the city from the water.; basically it was used for shipping and disposal of waste. In addition to various factories near Kanli also were rooming house for the poor and the hospital, so the smell was nauseating, not only from the water. By the mid-19th century there were the Baltic and Warsaw stations, and various churches. Now the channel is much became shallow and is mainly used by road because of the large number of bridges, it is crossed. Since the bridge is also linked terrible legend that arose when the laying of the road next to it. For it used the tombstones of ancient Scandinavians, and since then on a bridge just 10 years occur mass suicides since 1923 prygulo 89 people into the water, in 1933-107.