Perched on a rocky outcrop overlooking Arguenon Bay, the Château du Guildo is an invitation to travel back in time. Listed as a historic monument, this recently restored jewel of Breton heritage recounts nearly 10 centuries of history. Built as early as the 11th century, transformed and defended over the years, it today offers visitors a fascinating blend of medieval architecture and exceptional natural landscapes. The estate, a Natura 2000 protected area, covers 5.36 hectares, a blend of coastal woods, dunes, salt marshes, and mudflats. A haven for biodiversity: migratory birds, bats, and even seals find refuge here. Rare and protected endemic plants flourish in this unique setting.