In search of the lost river

  • Finished in 2022

  • 20/07, 22/07, 27/07, 29/07, 03/08, 05/08, 10/08, 12/08, 17/08, 19/08, 24/08, 26/08, 31/08

  • 17:45

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!


  • Child (6-11 years)*: € 28,00

  • Adult: € 35,00

  • Gold Pass annual ticket holder: -15 %

  • Cocoon Village Pass: -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:

Gold Pass annual ticket

Enjoy 50 % off a wide range of exclusive visits!