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Nature’n’Rail Underground lake of St-Léonard.

An expedition below the vineyards of St-Léonard.

Your RailAway leisure offer:

10% discount on admission.

To take advantage of the discounts, you must travel to your excursion destination by public transport. This is how our leisure offers work.

All aboard: paddle across the largest underground lake in Europe.

With a length of over 300 metres, the ‘Lac Souterrain de St-Léonard’ is the largest natural underground lake in Europe and can even be navigated by boat. During a half-hour trip, you will discover a fascinating universe – accompanied by a multilingual guide who will provide additional fun and excitement. The excursion can be perfectly combined with a hike along the Bisse de Clavau, a walk through the old town of Sion or a visit to the nearby castles.

More about the offer.

Tips for your outing.

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