Ferrier of Tannerre-en-Puisaye

The Ferrier of Tannerre-en-Puisaye is an ancient iron mining site spread across woodland terrain with multiple extraction pits and slag heaps marking the landscape. The grounds show clear traces of resource extraction through natural depressions and earth mounds that shape the terrain.

The site operated as a major iron production center during Roman times, processing ore through basic furnaces across the terrain. A medieval fortification was built here in the 10th century to defend an important trade route.

The medieval fortress Motte Champlay was constructed on the mining grounds in the 10th century to protect the road leading to Paris.

Visitors follow marked trails with information panels that guide them through the site and explain its past uses. Woodland conditions vary by season, so sturdy footwear is advisable.

After centuries of iron extraction, the grounds continued to be worked for slag recovery until 1982 before gaining protected status. This later industrial phase left additional layers visible in the landscape today.