The Castles and Town Walls of King Edward in Gwynedd are a series of impressive fortifications built during the late 13th century. These structures were part of a strategic plan by King Edward I to secure his control over Wales after the conquest. Notable examples include Caernarfon Castle, Conwy Castle, and the surrounding town walls, which showcase medieval military architecture. These castles and walls are recognized for their unique design and historical significance, reflecting the power dynamics of the time. They are now part of a UNESCO World Heritage Site, attracting visitors interested in history and architecture.