Forteresse Le Vieux Châtel

The fortress, one of the largest in Europe, covers 5 hectares and has 22 towers, 1.4 km of walls and three storeys of galleries and underground chambers.

It illustrates the changes in fortifications from the 11th to the 16th centuries and the ways in which forts were originally adapted to artillery attacks by metal cannon balls.

Its history is linked to the story of Europe itself and international volunteers have been working on the site for 30 years. A listed historic monument, like the late 15th-century Church of St. Lawrence.

Open: all year