The World Heritage Sites of Wales. From ancient fortresses to centres of great industrial innovation, the World Heritage Sites of Wales are protected by UNESCO as areas of global importance. A Pontcysyllte Aqueduct and Canal Pontcysyllte Aqueduct, Wrexham, North East Wales In 2009, a little more than 200 years after it was built, Pontcysyllte joined the likes of the Taj Mahal and Stonehenge on UNESCO’s World Heritage Sites list. Enjoy a horse-drawn canal trip, see the horseshow piers and be astonished by an aqueduct which holds 1.5 million litres of water. B Blaenavon World Heritage Site Big Pit National Coal Museum in Blaenavon, South Wales Valleys An incredible town with an iron heart, Blaenavon grew around an ironworks in 1788. These days it is home to the Big Pit: National Coal Museum, the Pontypool and Blaenavon Railway and, of course, the Blaenavon Ironworks. Set on a hillside, it’s the place to explore a proud industrial past. C Caernarfon Castle Caernarfon Castle courtyard, Snowdonia Edward I wasn’t messing around when he built this polygonal 13th century castle on a former Roman fort. Part of the coastal World Heritage Site, the mighty Caernarfon remains one of the most visually arresting sights you’ll ever see. Exhibition rooms also feature at a landmark to stir the senses. D Harlech Castle Harlech Castle, Snowdonia Such is its beautiful setting in Snowdonia, it’s hard not to believe some sympathetic positioning was afoot when it was built by Edward I more than 700 years ago. The views are unbeatable, but the massive inner walls of the fortress and battlements are equally impressive. Made for the camera. E Beaumaris Castle Beaumaris Castle, Anglesey The concentric designs and arching masonry of Beaumaris make it an enchanting place to visit, built as a royal palace for Edward I and realised for its architecture with World Heritage Site status. It was actually unfinished but, with views like these over the mountains, you’d never know it. F Conwy Castle Conwy Castle, North Wales Perched on a rock against the backdrop of Snowdonia, Conwy has an indisputably magical feel. Some consider it the finest castle Edward I built, and the mesmerising views from the battlements are particularly famed within the walled town. Great halls, private chapels and royal chambers wind through this medieval marvel. Enjoy this? Share it with friends Related items Wild winter in the north Ravens, choughs, baby seals – and hundreds of thousands of wintering birds. North Wales attractions Where to go and what to see during your adventure across the lands and seas of North Wales. Walks in North Wales Explore the soaring mountains and refreshing coastal walks of North Wales. North Wales' holy places Your guide to discovering some of the special and sacred places across North Wales. Faith in South Wales Your guide to some of the special sites of faith heritage across South Wales. South Wales' wildlife Wildlife is everywhere you look - from rare butterflies to bats and orchids to bluebell fields.