Underground Lake of St-Léonard & Valais Discovery Day Trip from Crans-Montana

Explore the Heart of Valais

Hidden Treasures

Lac Souterrain de St-Leonard

Lake of St-Léonard

Sion panorama

Tourbillon and Valere

Underground lake guided tour

Underground Lake of St-Léonard

Information

Crans-Montana Saint-Léonard Underground Lake Sion Crans-Montana
8 hours
Private driver with local expertise
Free cancellation up to 48 hours
Language - English (other languages upon request SP, PT, IT, FR, DE)
Advance booking period: 1 day
Seasonal availability: 15-May - 30-September

Overview

Available from April to October, Tuesday to Sunday

Highlights

Experience Europe’s largest underground lake of St-Léonard
Glide across its crystal-clear waters on a guided boat journey beneath the Alps
Discover the historic heart of Sion and its iconic hilltop castles

Description

Discover a refined blend of nature, culture, and local flavors on this private day trip from Crans-Montana into the heart of the Valais region. This curated experience balances relaxation and discovery, unveiling some of Switzerland’s most distinctive hidden gems.

Your journey begins with a private transfer from Crans-Montana to the underground lake of St-Léonard, nestled between Sion and Sierre. Hidden beneath the vineyards of the Valais, this remarkable natural site is the largest navigable underground lake in Europe.

Enjoy a serene, guided boat ride across the crystal-clear waters of Saint-Léonard Underground Lake. Glide silently through this otherworldly setting as your guide shares insights into its unique geology and history, enhanced by the calm acoustics beneath the Alps.

Continue to Sion, the capital of the Valais region, for a relaxed lunch at a local restaurant or vineyard terrace, where regional specialties are paired with panoramic alpine views.

The afternoon is yours to shape at leisure — whether through wine tastings, cultural discoveries, or a relaxed stroll through the old town’s cafés and boutiques.

Your day concludes with a relaxing return transfer to Crans-Montana, leaving you with lasting memories of this peaceful and authentic Valais experience.