The two stamps on this cover are from the Finnish National Parks stamp series. The stamp on the right is the last stamp in the series; Linnansaari National Park. It was issued in 2014 and was voted the most beautiful Finnish stamp of 2014. The stamp on the right is the first from the National Parks series; Pallas-Yllästunturi National Park. It was issued in 2009 and was voted the second most beautiful stamp in 2009. This stamp is embossed with Braille markings across its surface: "1 LK KL" meaning 1st class in Finnish and Swedish.
Myllykoski is or was a small community in the south of Finland that was amalgamated into nearby