The Lost City of Trellech
Trellech, Monmouthshire
In the 1200s Trellech was one of the largest towns in Wales, bigger than Cardiff, with an iron industry. Raids, plague and fire caused it to shrink to a small village, and its streets were lost.
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
- Medieval
- Where
- 51.7400, -2.7200
- Group
- Lost & drowned villages
Visiting
The village has Harold's Stones, a holy well and a summer dig that sometimes welcomes visitors.

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
- St Briavels CastleHaunted place · Forest of Dean, Gloucestershire · 3 miles away
- Tintern AbbeyCastle or abbey · Wye Valley, Monmouthshire · 3 miles away
- Clearwell CavesCave or grotto · Forest of Dean, Gloucestershire · 5 miles away
- The Chartist Trial, MonmouthExecution site · Shire Hall, Monmouth · 5 miles away
- The Kymin Round HouseTower or folly · The Kymin, Monmouth · 5 miles away
- Raglan CastleCastle or abbey · Raglan, Monmouthshire · 6 miles away