Phare des Birvideaux, Lighthouse on submerged rocks between Groix Island and Quiberon Peninsula, France
The octagonal stone structure rises 29 meters above the Atlantic Ocean, marking dangerous underwater reefs for maritime navigation in Morbihan.
Construction of the lighthouse began in 1880 and took 54 years to complete, making it the longest lighthouse construction project in French history.
Local maritime traditions include tales of an ancient submerged city named Aise, whose inhabitants emerge during the St. Columban celebrations on November 23rd.
The lighthouse operates with a two-flash white signal every six seconds and remains visible up to ten nautical miles at sea.
The foundation work required drilling one hundred holes into the submarine platform, taking five years to complete due to challenging ocean conditions.
Location: Morbihan
GPS coordinates: 47.48583,-3.29117
Latest update: May 25, 2025 12:00
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