Caernarfon
The walls of Caernarfon Castle are not grey. Stand close and you will see bands of different coloured stone, a deliberate echo of the Theodosian walls of Constantinople, because Edward I wanted his garrison town on the Menai Strait to announce imperial ambition, not merely military strength. That detail, missed by most visitors who spend five minutes photographing the exterior and moving on, tells you everything about what kind of place this is.
The Castle
Caernarfon Castle is managed by Cadw and sits at the heart of a UNESCO World Heritage Site that also includes the medieval town walls. In summer (July and August) the castle opens 9:30am to 6pm; the rest of the year hours are 9:30am to 5pm (March to October) or 10am to 4pm (November to February). Adult admission is around £15.20 in peak season and £14.50 off-peak; children under five enter free. Cadw members get in without charge. There is no timed-entry booking system for Caernarfon, so you can simply turn up, though weekend mornings in July and August see the longest queues. Arriving at opening time or after 4pm keeps waits short.
The castle’s Eagle Tower, at the western end, is where Edward I’s son was born in 1284. The story that Edward I promised the Welsh a native prince “who spoke no English” and then produced the infant is almost certainly a 16th-century invention, but the political calculation behind the birth here was entirely real. The boy would be named Prince of Wales in 1301 at a Lincoln parliament, beginning the tradition that continues today. The 1969 investiture of Charles as Prince of Wales took place in the castle’s inner ward, broadcast live to 500 million viewers. Less known: for much of the 18th and 19th centuries, the investiture ceremony had quietly been held in London, and it was David Lloyd George, a Welsh-speaking politician from Caernarfonshire, who pushed to bring it back to Wales for the 1911 ceremony of the future Edward VIII.
Segontium Roman Fort
A short walk from the town centre, Segontium predates the medieval castle by more than a thousand years. The Romans established the fort around AD 77 and held it intermittently until around 394. The free museum on site explains how the occupying garrison interacted with local Ordovices tribes. It is one of the better-interpreted small Roman sites in Wales and rarely crowded.
The Town Walls
The medieval walls that enclose the old town are largely intact and walkable in sections. Most visitors ignore them entirely in favour of the castle; that is their loss. The views from the wall tops over the Menai Strait toward Anglesey are better than anything you get inside the castle itself, and the walk takes less than thirty minutes.
Where to Eat
Osteria, on Hole in the Wall Street a few metres from the castle, is the kind of place you find by accident and return to on purpose. The menu is genuinely Tuscan, the wine list is taken seriously, and the dining room is tiny, so booking ahead is worth doing. Budget around £30-40 per head with wine.
The Black Boy Inn on Northgate Street dates from around 1522 and serves Welsh pub food in a building that feels its age in the best way. Lamb cawl, local cheeses, and ales from nearby microbreweries make it a reasonable choice for lunch or a low-key dinner. Mains run £12-18.
For breakfast or a working lunch, the Bakehouse (Ty Becws) near the market square turns out good coffee and fresh bakes from local suppliers. It is popular with locals, which is usually the most reliable indicator of quality in a town this size.
Where to Stay
The Celtic Royal Hotel on Bangor Street is the closest thing to a full-service hotel in the town centre, with parking, a restaurant, and rooms from around £90 per night. It sits within easy walking distance of the castle and quayside. For something smaller, Meifod House is a well-reviewed guesthouse with rooms from around £70, favoured by independent travellers who want somewhere comfortable without paying for amenities they will not use.
If you want to be outside the town, Aberdunant Hall near Porthmadog offers country-house accommodation at a higher price point and was listed among the top fifty hotel restaurants in the UK in 2025. Worth considering if Caernarfon is a base for Snowdonia rather than a single overnight.
Getting There
Caernarfon does not have a railway station. The closest mainline services run to Bangor, roughly 10 kilometres east, from which local buses connect to the town in about 20 minutes (Arriva Cymru routes). From Manchester, Bangor is around two hours by train. Drivers from Chester reach Caernarfon in about an hour via the A55. Parking is available at several town-centre pay-and-display car parks; the Victoria Dock car park is convenient for the castle.
Activities Beyond the Obvious
The Welsh Highland Railway runs from Caernarfon south through the Aberglaslyn Pass to Porthmadog, a journey of about an hour and a half through some of the most dramatic scenery in Wales. It connects at Porthmadog with the Ffestiniog Railway, giving you a narrow-gauge loop that serious railway enthusiasts travel from across Europe to experience. Book ahead in summer; the trains sell out on peak days.
The Menai Strait offers kayaking and paddleboarding, and several operators based at the Victoria Dock can arrange tidal kayak tours that take you under the Menai Suspension Bridge. Timing matters here: the tidal currents in the strait are strong enough to be dangerous for inexperienced paddlers, and reputable operators schedule their trips around the tides rather than fixed departure times.
The Caernarfon Market runs on Thursdays and Saturdays in the town square and is genuine rather than touristy, mostly Welsh-language conversation among stalls selling local produce and practical goods rather than souvenirs.
Calendar Notes
If you are visiting in August, be aware that the Royal Welsh Show at Builth Wells (usually the third week of July) pulls agricultural Wales northward, and accommodation near Caernarfon can tighten. School half-term weeks in late October bring families from the Midlands and northwest England; if you want the castle quieter, aim for September or early October when summer pricing drops and crowds thin. The castle operates on Welsh time (UTC+1 in summer), the same as the rest of the UK, but if you are crossing from Ireland via Holyhead on Anglesey, allow time for the ferry schedule rather than assuming you can make an afternoon castle visit on arrival day.
The town is small enough that a single day covers the main sites. Two nights makes more sense if you want to take the mountain railway south and spend time on Anglesey. Three nights or more is only justified if Snowdonia walking is the real draw and Caernarfon is simply where you are sleeping.