Skiers in Morzine in the Franco-Swiss Portes du Soleil region have the unusual opportunity to discover not what's just under the snow but what's under the mountains they're skiing on.
Cavers can access intricate tunnel systems that have been naturally formed by the rock over time and Mégevette and La Balme offer a multitude of caves to explore.
The Evolution2 ski school can organise tours according to your level, from complete caving beginners, with a French state-certified instructor guiding participants of all ages safely through the rock formations.
The tours combine scientific, sporting and environmental aspects whilst introducing participants to a unique and fantastic mineral world, Evolution 2 say, adding,
"Immerse yourself, in the heart of the Alps, in another universe, silent and mysterious."
A half day caving experience is priced from €60 / £50.75pp.