There is no better day trip from Llandudno than Conwy. The two towns are only four miles apart, but they represent entirely different chapters in Welsh and British history. Where Llandudno was planned and built by Victorians in the 1850s as a resort of deliberate pleasure and ambition, Conwy was built by Edward I in 1283 as an instrument of conquest and control: a castle, a walled town, and a garrison all created together as the mechanism for subduing the Welsh heartland. The contrast between these two different purposes — pleasure and power — and the buildings each produced is one of the most instructive experiences North Wales can offer.
Conwy Castle is among the finest medieval fortresses in Europe and a UNESCO World Heritage Site. Built in just six years under the direction of the master military architect James of St George, it remains almost wholly intact: eight great towers, a wall walk connecting them, the inner ward with the royal apartments and Great Hall, and the views from the towers over the estuary, the walled town, and the mountains beyond. Allow at least two hours for the castle alone. Cadw manages the site and entry is charged.
Perhaps more impressive than the castle in their ambition are Conwy's town walls, which survive almost complete — 21 towers, 3 gatehouses, and over a mile of wall circuit, still walkable for much of their length. This is the most complete set of medieval town walls in Britain, and walking them gives a visceral sense of the scale of Edward I's programme of conquest: not merely a castle, but an entire fortified English town imposed on the Welsh landscape. The effort and expense involved, in 13th-century terms, was extraordinary.
The wall walk is free to access and offers views over the town, the estuary and the surrounding landscape that match anything you can see from the castle towers. The three surviving gateways through the walls — Upper Gate, Lower Gate, and Mill Gate — are still functioning entry points to the medieval town core. Walking through them, you pass through the same stone archways that have been the entry to Conwy for 750 years.
The Conwy quayside, where the medieval town meets the estuary, is one of the most photographed locations in Wales. The view upstream to the castle and the three bridges — Telford's suspension bridge, Stephenson's tubular railway bridge, and the modern road bridge — is a masterpiece of layered history compressed into a single viewpoint. The quayside itself is lined with fishing and pleasure boats, restaurants and cafes, and has the working harbour character that Llandudno, with its pleasure pier, lacks.
The Smallest House in Britain on the quayside (genuinely tiny: 6 feet wide, 10 feet high) is visited by tourists from around the world and provides the kind of straightforward curiosity that a quayside needs. More substantial is Plas Mawr on the High Street: the most complete surviving Elizabethan town house in Wales, managed by Cadw and open to visitors. Aberconwy House, a medieval merchant's house managed by the National Trust, completes Conwy's remarkable concentration of historic buildings within a small area.
The easiest way to get to Conwy from Llandudno is by car: the journey on the A546 takes about ten minutes and the approach via the suspension bridge gives an immediate sense of the castle's scale. There is limited parking inside the walled town but larger car parks adjacent to the walls. By local bus, services connect Llandudno and Conwy regularly; check Traveline Cymru for current timetables. By train, Conwy is one stop from Llandudno Junction on the North Wales main line, though trains do not stop at Conwy station on all services; check the Transport for Wales timetable.
A full day in Conwy allows comfortable visits to the castle, a full circuit of the walls, the quayside, Plas Mawr and Aberconwy House, with lunch at one of the quayside restaurants or the cafes within the walled town. A half day is sufficient for the castle and walls alone. Conwy is at its most atmospheric early in the morning before the coach tours arrive, or in the evening when the day visitors have gone and the castle is floodlit above the town.