The Mean Ruz Lighthouse, a sentinel of pink granite

Built on a pink granite promontory at the entrance to the port of Ploumanac'h, the Mean Ruz lighthouse has been watching over the coast since 1948. Its name means "red stone," a tribute to the hue the granite takes on at twilight. The first lighthouse was built in 1860 at the request of fishermen concerned about maritime safety, then destroyed by German troops in August 1944. The current structure, the work of architects Henry Auffret and Joël Hardion, was designed to harmonize with the surrounding granite chaos. Built from La Clarté pink granite, its interior mosaics were created by the Rennes-based mosaic artist Isidore Odorico. Standing fifteen meters tall, it emits a red light visible from twenty kilometers away. Although the interior is not open to the public, the lighthouse can be reached on foot via the Customs Officers' Path, just a few minutes' walk from the Castel Beau Site. From the granite bridge leading to it, the panorama reveals views of the Costaérès castle, Renote Island, and the Sept-Îles archipelago.