Tiny St Léonard, 5.5km northeast of Sion, hides Europe’s biggest underground lake. To see the emerald waters shimmer, join a 30-minute guided tour by boat. Trains link Sion and St Léonard (Sfr3.60, three minutes, hourly).
Lac Souterrain St Léonard
Valais
Lonely Planet's must-see attractions
26.2 MILES
If ever a castle could fit the fairy-tale bill, the dashingly handsome Château de Chillon would be it, with its moat, double ramparts and riot of turrets…
20.37 MILES
This renowned gallery harbours a stunning art collection with works by Picasso, Cézanne and Van Gogh. The sculpture garden (with cafe and picnic area)…
11.63 MILES
On clear days the views from this world-first peak-to-peak footbridge are heaven-sent; think legendary Mont Blanc and the Matterhorn, plus Eiger, Mönch…
20.04 MILES
Clinging to a crag above town, 800-year-old Bâtiaz Castle is worth the 15-minute uphill climb. Once there, add another 120 steps to the top of castle for…
3.33 MILES
Slung on a hillock opposite Château de Tourbillon is this 11th- to 13th-century château that grew up around a fortified basilica. The church interior…
22.61 MILES
Views from Zermatt’s cable cars are all remarkable, but the Matterhorn Glacier Paradise is the icing on the cake. Ride the world's highest-altitude 3S…
2.06 MILES
Don't miss this stunning art gallery with mountain peaks looming large on its dazzling mirrored facade and silver-leafed edelweiss in the Alpine rooftop…
28.53 MILES
Cailler has been making chocolate since 1825, and its entertaining factory tours take visitors on an extravagant twirl through chocolate history, made…
Nearby Valais attractions
2.06 MILES
Don't miss this stunning art gallery with mountain peaks looming large on its dazzling mirrored facade and silver-leafed edelweiss in the Alpine rooftop…
3.16 MILES
Lording it over the fertile Rhône Valley from its hilltop perch above Sion, the crumbling remains of this medieval stronghold, destroyed by fire in 1788,…
3.33 MILES
Slung on a hillock opposite Château de Tourbillon is this 11th- to 13th-century château that grew up around a fortified basilica. The church interior…
3.34 MILES
This museum in the Château de Valère spells out Sion’s history in artefacts.
3.46 MILES
Lodged in a small château, this well-curated fine-arts museum showcases works by Swiss artists including Ernest Bieler and Caspar Wolf, alongside star…
5.05 MILES
At the mouth of the valley on its western side, Vercorin is geared up for families with gentle skiing on 35km of downhill slopes. It can be accessed by…
7. Sierre Musée Valaisan de la Vigne et du Vin
5.26 MILES
This enchanting wine museum with old presses and other wine-related curios sits inside the 17th-century turreted manor of Château de Villa. Taste…
7.87 MILES
This gabled wine museum turns the spotlight on wine growing around Salgesch with the focus on education. This is also the start (or end) of the Sentier…