The wild rushing rapids of Juvéninkoski are located in Partala, Jämsä. The water surges over the sheer rock face, forming a spectacular waterfall. Juvéninkoski is on the Nytkymenjoki River, which has a total of nine rapids. Juvéninkoski is the most impressive of these. The gorgeous waterfall is nearly seven metres in height. You simply cannot miss the highest and steepest free-falling waterfall in Central Finland.