Tre'r Ceiri
Yr Eifl, Gwynedd
Tre'r Ceiri sits 450 metres up on Yr Eifl. Inside its walls, which still stand up to four metres high in places, are the remains of about 150 stone houses.
Read the full story, see it on the map, get directions and find what else is nearby in the free Hidden Britain Atlas map.
- When
- From c. 200 BC
- Where
- 52.9740, -4.4230
- Group
- Circles & monuments
Visiting
Free. A steep climb from the road above Llanaelhaearn.

The Ledger of Lost Britain
The Romans arrived in AD 43. For most people that is where the history of Britain begins. But by the time the legions landed, people had already been living on these islands for thousands of years. They had hunted, farmed, mined flint, dragged stones across the country, raised a hill by hand, and buried their dead in great tombs. They left no written words. What they left was the ground itself. Every place in this book can be visited, or has been dug up, or is in a museum.
Nearby mysteries
- Nant GwrtheyrnLost village · Llŷn Peninsula, Gwynedd · 2 miles away
- Ffynnon BeunoHoly well · Clynnog Fawr, Gwynedd · 4 miles away
- Ffynnon GybiHoly well · Llangybi, Gwynedd · 5 miles away
- St Dwynwen's WellHoly well · Llanddwyn Island, Anglesey · 11 miles away
- Owain Glyndŵr's CaveCave or grotto · Moel Hebog, Gwynedd · 12 miles away
- Caernarfon CastleCastle or abbey · Caernarfon, Gwynedd · 13 miles away