tranquil wooden pathway to kivakkakoski waterfall in paanajarvi national park in karelia, surrounded by lush greenery

paanajarvi national park karelia pathway kivakkakoski waterfall forest hiking nature outdoor adventure wooden trail tranquility wilderness lush greenery tourism travel scenic beauty exploration wildlife natural landscape finland trails management signage walking peaceful reserve ecological conservation seekers rural trekking walks camping pine trees relaxing solitude boards routes fresh air sustainable enthusiasts tranquil surrounded walkway invites hikers serene thrives direction