The Castle can be visited
Château de Fougères

The Château de Fougères is a castle in Brittany, France. This fortress, built on a natural rock outcrop in the midst of a swamp, is surrounded by a loop of the Nançon river, which serves as a natural moat. With its thirteen towers, it is considered one of Europe's largest medieval fortifications.
History+
The castle's origins date back to the 11th century, when the House of Amboise erected a first wooden fort here. In 1166, this structure was destroyed after a siege by King Henry II of England. Immediately thereafter, Raoul II Baron de Fougères had the castle rebuilt.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Christa1004
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 48.3539, -1.2095