8 euros, free under 14, 4 euros 14-26. Under 14s must be accompanied by an adult.
There are often long queues as numbers are limited inside. Try to go on a weekday when queues are shorter.
Be prepared for 130 steps down and another 80 or so up again at the end, and wear warm clothing; the temperature down here is around 14°C.
Dark tunnels mean it's not for the claustrophobic.
- Backpackers / Students
- Culture vultures
- Families with teenagers
- Seasoned travellers