The Piispankivi memorial stone is built for honouring the events of the World War Two. On the 4th of Juky in 1943 the partisans of the Soviet Union attacted a bus which was heading to the north. The memorial stone is named after Yrjö Wallinmaa, a bishop of Oulu diocese, who got killed in the attact. Also a stream in the accident place, Piispanoja, is named after the bishop. There are guide signs telling about the attact in Piispanoja close to the Piispankivi memorial stone. There is also a parking place next to the stream so it is easy to visit the place by car.