Pistokiekka forms a shore formation site, which, in addition to the current erosion collision, which is about 700 m long and 3-4 m high, has ancient beaches and rock outcrops in the area.
This is one of the three circular routes that lead across the peninsula. Again and again you come across information boards that explain geological features.
Loketononkalo is a northwest-southeast trending channel that was eroded by meltwater from the continental ice sheet at bedrock weaknesses. (For more information see Saimaa Geopark Geopark Finland)