. Children above 5 y.o. under the care pf parents, groups with guardians and adults – on the Historical Route. Children above 8 y.o. under the care pf parents, groups with guardians and adults – on the Extreme Route. Persons fit enough without any ailments, on the Expedition Route.
Underground there is permanent dusk and it is very humid, and some corridors are very low.
We do not recommend visiting for persons suffering from claustrophobia. We ask parents to think twice before they decide to visit the complex with very little children.