Wikipedia
Pöyrysjärvi (Myrskylä)
Pöyrysjärvi is a lake surrounded by the open bog on the border are of the town of Orimattila and municipality of Myrskylä. It is classied as a precious natural reserve in Päijänne Tavastia county. Apart from that the city of Orimattila classifies it as an important object for teaching of marsh types and its fauna.
The other lakes connected to the Myrskylänjoki watershed are Isojärvi, Vähäjärvi, Muttilanjärvi, Siippo, Sopajärvi, Kirkkojärvi ja Sulkavanjärvi.