I went on a long walk this afternoon. Here are some shots.
The source of the river Porvoo is on the south side of the First Salpausselkä in Hollola. The river meanders through the flat lands of the southern Päijänne Tavastia and Uusimaa and empties into the Gulf of Finland in the medieval town of Porvoo about 50 km east of Helsinki. The river is quite small here as this was taken about 5-10 km downstream from the source.