The Best Castles in North Wales
North Wales holds some of the finest medieval fortresses in Europe. Their towers rise above harbours, rivers and mountains, each one a piece of the story that shaped this land. From Caernarfon and Conwy to Harlech and Flint, these castles still dominate their landscapes, echoing centuries of power, pride and resilience.
Caernarfon Castle
The great fortress of Caernarfon stands beside the Menai Strait, built by Edward I in the late 13th century. Its polygonal towers and banded stonework were inspired by the walls of Constantinople, a deliberate symbol of imperial ambition. Today, visitors can climb to the Eagle Tower for sweeping views of the harbour and explore exhibitions inside that trace the castle’s royal past. Caernarfon remains the ceremonial site of the investiture of the Prince of Wales.
Conwy Castle
Encircled by medieval walls that still frame the old town, Conwy Castle combines strength and grace. Its eight towers rise above the estuary, giving panoramic views across to Deganwy and the mountains of Eryri. Built in just four years, it is one of the best-preserved examples of medieval military architecture in Britain. A walk along the town walls at sunset offers views that have changed little in more than seven centuries.
Harlech Castle
Harlech seems to grow straight out of the rock, a grey crown above the dunes and the sea. It played a central role in the Wars of the Roses and inspired the famous marching song “Men of Harlech.” From the gatehouse, steps lead down the “Way from the Sea,” once used to bring in supplies during siege. The views from its walls stretch across Cardigan Bay to the distant peaks of Snowdonia, a sight that stays with you long after the visit.
Dolbadarn Castle
Not all the great castles of North Wales were English in origin. High above Llyn Padarn near Llanberis stands Dolbadarn, built by Llywelyn the Great in the early 13th century. Its single round tower guarded a key mountain pass long before the English invasion. From the ruins, you can look up towards Yr Wyddfa (Snowdon) and down the lake towards Padarn Country Park. Dolbadarn represents a different story, one of Welsh rule, identity and endurance.
Flint Castle
Flint was the first of Edward I’s Welsh fortresses, positioned on the Dee Estuary to control trade and movement. Though partly in ruin, its distinctive detached tower remains one of the most unusual designs in Britain. From here, you can follow the Wales Coast Path along the estuary for birdwatching and wide sea views. The castle’s quiet setting makes it perfect for a reflective stop on your way into North Wales.
Each of these sites is cared for today by Cadw, the Welsh Government’s historic environment service. Together they form part of a World Heritage Site that tells the story of a nation and its place in European history.
Ready to Explore These Castles for Yourself?
Plan your trip and discover places to stay near North Wales’s most remarkable castles, from seaside towns to mountain villages. You can also visit our Experiences page for guided tours and day trips across the region.
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