The Oravivuori trail leads to the top of Oravivuori hill in Korpilahti’s Puolakka, where one of the survey points of the famous Struve Geodetic Arc, part of the UNESCO World Heritage List, is located. The impressive triangulation tower on the summit of the hill is a sign of the significance of Oravivuori, and Puolakka measuring station, in the mapping of Finland. The path leading to the top of Oravivuori is about 1 km long and the rocky slope is quite steep in places. The views from the triangulation tower out over Lake Päijänne are beautiful.
Retkipaikka link: http://retkipaikka.fi/vapaa/struven-ketju-puolakka-korpilahti/