Address: Kantatie 311, 19230 Onkiniemi
This erratic boulder sitting on a rock surface smoothed by the continental ice sheet is the best-known rocking stone in Finland.
Onkiniemi Rocking Stone is located in Sysmä. It can be easily spotted from the E75 main road. The erratic boulder was positioned in this peculiar way by the continental ice sheet.
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Nearby accommodations
Adelecourt
Distance: 4.9 km
40 km north of Heinola, lake Uurajärvi 20 m (length 3,5 km, width 1 km), hard, shallow gravel bottom, own boat.
Pilvilinna
Distance: 8.4 km
Log cottage by a small artificial pond, 40 km north-east of Heinola.