The Logan Rock is an example of a logan or rocking stone. This geological feature is near the Cornish village of Treen in the Penwith district of Cornwall, England, United Kingdom.

The rock is an eighty ton granite boulder perched on the edge of the cliffs overlooking the Atlantic ocean, on a headland one mile south of the village. The rock is finely balanced due to the actions of weathering, and prior to its restoration in 1824 it could be rocked by applying only a little pressure

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