Valkenburgs Grottenaquarium

The Valkenburg cave aquarium has been enjoyed by over 8 milion enthusiastic visitors from all over the world over the last 55 years. 
A visit to this aquarium, which is located in a real underground cave, is an unforgettable experience for everyone.
The aquarium displays a colletion of fresh water and marine fish, reptiles and amphibians.
Regardless of weather conditions outside, the temperature is always around 20 degrees.

- Opening hours:
From Easter to autumn vacation: Monday till Sunday from 11 AM - 4.30 PM
July and August: Monday till Sunday from 10.30 AM - 5 PM

Other info: see website