
thumb|Kummakivi in September 2015. thumb|Another angle with person for scale
thumb|Kummakivi in September 2015. thumb|Another angle with person for scale
Kummakivi () is a large balancing rock in Ruokolahti, Finland. The boulder is a glacial erratic that lies on a convex bedrock surface with such a small footprint that it almost appears to be moving, but so firmly that it cannot be rocked with human force.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).