Imatrankoski

Imatrankoski are rapids on the Vuoksi in Imatra, Finland. It has been a famous tourist attraction since the late 1700s. Imatrankoski is also one of the National landscapes of Finland. Since 1929, the rapids have been blocked by a dam as the Imatra hydroelectric plant began operation. Today, the dam is opened daily between June and August as well as on Christmas Day and New Year's Eve. (Wikipedia)