As part of the European Heritage Days, you'll have a special opportunity to discover the underground passage and the lunette d'arçon.
The tour lasts two hours and includes a number of steps and outdoor stops: please bring appropriate equipment for the season (closed shoes, water bottle, hat...).
Reservations can be made at reception
Payment methods
Bank/credit card
Check
Travellers Cheque
CashOpening times
From 19 September 2026 until 20 September 2026
From 19 September 2026 until 20 September 2026
Saturday
10:00 - 11:00
