Runnel Stone, Rock formation near Gwennap Head, Cornwall, Great Britain
The Runnel Stone stands as a submerged pinnacle reef located one mile south of Gwennap Head, marking a significant navigation point along the Cornish coast.
Between 1880 and 1923, the reef caused at least 30 steamship groundings, with the SS City of Westminster collision reducing its height by 20 feet.
The Runnel Stone Marine Conservation Zone spans 20 square kilometers, protecting deep-sea rocks and marine habitats in the surrounding waters.
Trinity House maintains navigation aids near the formation, including colored cone-shaped markers on Gwennap Head and a large buoy with a whistle system.
Marine currents around the submerged rock formation create excellent diving conditions, revealing multiple shipwreck remains and diverse marine species.
GPS coordinates: 50.03000,-5.67500
Latest update: March 2, 2025 21:30
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