1. Caerphilly Castle: Located in Caerphilly, South Wales, this castle is considered the largest castle in Wales. It was built in the 13th century by Gilbert de Clare, Earl of Gloucester.
2. Conwy Castle: Situated in the town of Conwy in North Wales, Conwy Castle is a medieval fortress constructed by King Edward I of England in the late 13th century. It's known for its well-preserved curtain walls, towers, and gatehouses.
3. Cardiff Castle: Located in the capital city of Wales, Cardiff, Cardiff Castle has a rich history spanning over 2,000 years. The castle's origins date back to Roman times, and it has undergone various transformations throughout the centuries, serving as a stronghold, a noble residence, and a military barracks.