Nearby
Castles near Caernarfon
Caernarfon is one of four related castles built by Edward I and recognised together as a single UNESCO World Heritage Site. Here's how they compare, plus what's within easy reach for a day trip.
The other "Iron Ring" castles
Caernarfon, Conwy, Harlech and Beaumaris were all built as part of Edward I's campaign to control conquered Wales, and are jointly inscribed by UNESCO as the "Castles and Town Walls of King Edward in Gwynedd." Each has a distinct character worth knowing before you decide how to split your time.
| Castle | Distance from Caernarfon | What it's known for |
|---|---|---|
| Conwy Castle | ~22 miles / 35km | Best-preserved medieval fortifications in Britain, with a near-complete walled town |
| Beaumaris Castle | ~10 miles / 16km (Anglesey) | The most architecturally "perfect" concentric castle design, though never fully finished |
| Harlech Castle | ~24 miles / 39km | A dramatic clifftop setting with sweeping views toward Snowdonia and the sea |
| Dolbadarn Castle | ~9 miles / 14km | A smaller, native Welsh-built castle near Llanberis, predating Edward's conquest |
"Conwy or Caernarfon?" — which should I choose
If you can only visit one, Caernarfon generally offers more to explore inside (multiple towers, the Royal Welch Fusiliers Museum, more dramatic architecture) while Conwy offers the more completely preserved overall townscape, including one of the best-preserved sets of town walls in Europe. Both are roughly comparable in terms of visit length. If your schedule allows, seeing both — they're under an hour apart by car — gives a much fuller picture of how Edward's castles varied.
Closer to home: Caernarfon's own town walls & Segontium
You don't have to travel far for more history. The Caernarfon Town Walls and Porth Mawr Tower sit right beside the castle and are also managed by Cadw — a short, free-to-view walk. About half a mile away is Segontium Roman Fort, the Roman garrison that predates the castle by over a thousand years and directly informed Edward I's choice of site.
Building a day trip
A realistic day covering Caernarfon plus one nearby castle: allow 2 hours at Caernarfon (see our visiting guide), 30–45 minutes' drive to Beaumaris or Conwy, and 1.5–2 hours there — a full but manageable day. Doing all four Edwardian castles in a single day is possible only if you're prepared to move fast and accept a much shallower visit to each.
If you're visiting several sites
Cadw's membership and Explorer Pass options (see tickets & prices) can be worth it if you're planning to see Caernarfon plus Conwy and/or Beaumaris, since all are Cadw-managed. Check current pass pricing directly with Cadw before you commit.
Cadw official visitor information; UNESCO World Heritage Centre listing. Distances are approximate driving distances. See Sources & Citations.