In search of the lost river

A rite of passage in the depths of the Earth

Through the haven of unspoilt nature known as the Domain of the Caves of Han runs a river, the Lesse. This beautiful yet unpredictable river plays hide-and-seek, disappearing underground only to suddenly   reappear around the corner. 

In smalls groups (max. 15) accompanied by a Ranger, follow the mysterious underground course of the Lesse river and learn more about this strong-willed river. Take a journey from the Belvaux Chasm sinkhole (in the heart of the Wildlife Park) to the Trou d'Enfaule Hole in the centre of the Earth! And then, for the grand finale of your tour, you will discover the river's most beautiful creation: the majestic Cave of Han!

Useful information

  • 3h

  • 9°C

  • 510

  • WC

  • Visit mainly on foot

Please remember to dress warmly and wear walking shoes!

Meeting place: please make sure that you arrive at the meeting place for your visit at least 15 minutes before the departure time: walk towards 46, rue des Grottes. Walk across the playground towards the owl. Then follow the green arrows (departure with the Safari-bus). If you are late, we cannot guarantee that you can take part in the visit, nor will we refund your tickets.


  • Child (6-11 years)*: € 28,00

  • Adult: € 35,00

  • Membership holder: -15 %

  • Cocoon Village lodger: -50 %

* Minimum age required for children: 6 years.

Booking compulsory

Buy your tickets online from our online ticketing shop:

Got questions?

Feel free to contact our Bookings Team:

Important information: we reserve the right to cancel an exclusive visit if there are less than 4 participants. In the event of a cancellation, you will be informed, if possible, at the latest 24h in advance. In this case, you can reschedule your visit or request a full refund. If you would like to make a same-day booking or book a visit for the next after, please contact our Bookings Team either by email or phone (see contact details above) to make sure the visit will take place.

12 months membership

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