Located at only about seven kilometres from the centre of Lahti city, at Linnaistensuo Mire a real wilderness atmosphere can be experienced. Linnaistensuo is a typical example of a southern Finnish raised bog.
The tranquil mire landscape can be admired from the duckboard trail crossing it. The nature reserve covers an area of 200 hectares and contains examples of 15 different natural mire types, with a peat layer nearly three metres deep on average.
The Linnaistensuo nature reserve was formed to protect a representative sample of nature typical to the mires of the Lahti region. Most of the mires in Lahti region have been drained by ditches and taken into forestry use. At Linnaistensuo the ditches have been blocked to restore the natural state of the mire. Majority of the nature values remained. Linnaistensuo Mire belongs to the Natura 2000 network of the European Union.