Tour of the Caverne du Dragon

Groups

Groups of fewer than 30 people 5€ per person
Groups of more than 30 people 4€ per person 

School groups

2.50€ per person

2 free admissions for every 30 people

- from 30 to 59 people, 2 free admissions
- from 60 to 89 people, 4 free admissions
- from 90 to 120 people, 6 free admissions
Etc.