Kummakivi

'odd stone' or 'strange stone')[1] is a large balancing rock in Ruokolahti, Finland.

The 7-metre (23 ft) long boulder lies on a convex bedrock surface with a very small footprint but so firmly that it cannot be rocked with human force.

[2] According to scientific consensus, it was likely moved into its place by shifting masses of ice 11,000 to 12,000 years ago.

[citation needed] A pine tree originating from the 1980s grows on top of the boulder.

[dubious – discuss][citation needed] The boulder is located in a forest in the western part of the Ruokolahti municipality, near the border of Puumala.