The experience alternates between a first section by boat and a walking ascent along the underground Negro River up to its spring. The excursion offers an authentic contact with the underground world in a fascinating and adventurous setting.
The internal temperature remains around 15°C, while the water temperature is about 10°C.
The experience is recommended for participants aged 14 and over and is particularly suitable for nature and speleology enthusiasts.

• Duration: 2 hours 

• Number of participants: 8 

What to bring :

• fleece, sweatshirt or light jacket
• trekking shoes that can get wet
• towel
• bandana
• spare clothes and shoes

Included : 

• short wetsuit
• waterproof boot covers
• helmet with lighting system
• harness
• changing rooms and showers