Pennard Castle is an early 12th-century Norman stronghold perched dramatically above Three Cliffs Bay on the Gower Peninsula in Wales. Built as a timber ringwork following the Norman invasion, it was strengthened in the 14th century by the powerful Braose family with stone walls and towers, creating a compact fortress around a central courtyard. The castle's occupation was eventually abandoned due to encroaching sand dunes, making it one of Wales' most poignant examples of environmental impact on medieval settlements. Today, protected as a Grade II* listed building, its atmospheric ruins overlook sweeping coastal vistas and remain a testament to Norman military architecture and the region's medieval history.