Important
- A fixed starting price based on 1 to 10 participants.
- The guide is included .
- You can choose and modify the number of participants, up to a maximum of 10 people. There is no need to notify us in advance.
- For an additional fee, the number of participants can be increased to 15 people.
- The minimum age of participants is 16 years.
- For this type of visit, please wear sturdy clothing..
- This visit is not possible for people with reduced mobility or for people in a wheelchair and is strongly discouraged for people with heart problems and people with claustrophobia.
- Pre-booking is required and can be made up to 8 days before the date of the visit.
- Cancellations can only be made by email and up to 2 business days before the tour date. In case of late cancellation or no-show, the reservation will still be charged.
- Payment at the ticket office, electronically or in cash, on the day of the visit.