Conditions
- Tours are available every day (except Tuesdays) and every hour from 10am to 5pm
- Tours available in French, English and German
- 19 people maximum
- Minimum booking 20 days in advance Please note that for safety and comfort reasons, this tour is not accessible to people with special accessibility needs, to those sensitive to vertigo, or to elderly visitors likely to experience physical difficulties. The tour includes a staircase with 96 steps to climb, and includes a narrow passageway that may represent a constraint for some visitors.