Flag Fen
Near Peterborough, Cambridgeshire
In 1982 Francis Pryor stumbled on a causeway of more than 60,000 timbers running a kilometre across the fen. For over a thousand years, people threw swords, spears and jewellery into the water on one side of it.
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
- c. 1365–967 BC
- Where
- 52.5740, -0.1900
- Group
- Circles & monuments
Visiting
Flag Fen Archaeology Park is open to visitors.

The Ledger of Lost Britain
From the south side of the post line, and only the south, objects were dropped into the water for more than 1,200 years. They were swords, spearheads, gold earrings, tiny pins and brooches.
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.
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