Hiking & nature

UNESCO Biosphere Tour

Karst walk on the Schrattenfluh with cave expedition

Join the adventure! Discover the Teufelsspuren (literally the “Devil’s Marks”, deep grooves in the limestone) and climb down a long ladder into the cave known as the Silwängenhöhle. Once you’ve arrived in the mysterious underground world, you’ll be able to find unique dripstone formations and colourful walls of rock. The UNESCO Biosphere also offers courses, excursions and adventures on a variety of topics related to the UNESCO World Heritage Biosphere Reserve at Entlebuch. From cooking with wild herbs to the Alpine horn and from wood sculpting to baking rye bread, there’s something to satisfy every taste.

Availability Today (Tuesday) open

Karst and cave excursion

Saturday, 8 June 2019 
Thursday, 4 July 2019 
Friday, 26 July 2019 
Friday, 2 August 2019
Sunday, 1 September 2019 
Wednesday, 2 October 2019

Sunday, 14 June 2020
Friday, 10 July 2020 
Tuesday, 4 August 2020
Tuesday, August 2020
Thursday, 3 September 2020
Sonntag, 4 Oktober 2020

Meeting point: 9.15 hours Sörenberg Tourist Office.
Duration: approx. 6 hours, including approx. 3.5 hours’ walking (300 m ascent)
End of the excursion (Wagliseichnubel): at approx. 15.00 hours


25 May to 4 Oktober 2020

Subject to change without prior notice


Karst and cave excursion

  • CHF 22.00 Children up to 15.99 years
  • CHF 35.00 Adults
  • CHF 57.00 Families max 2 adults and 3 children

For groups (of 10 or more people), a customised offer is available on request 

Prices in CHF incl. VAT / Prices and products subject to alteration.


Karst and cave excursion

  • Circular walk over sharp-edged limestone rocks; hiking boots and steady footing required
  • Equipment: hiking boots, rainwear, warm clothing for the cave visit, packed lunch and drinks
  • Tour led by Pius Schnider or Armin Thalmann, karst limestone and cave guides

Biosphere Academy

All excursions and courses offered by «Biosphärentours» can also be booked for groups on dates other than those set aside for the public events.

Weather & webcam Today: fair weather 8/19°

Day Weather Temperature
Today fair weather 8/19°
Tomorrow sunny 9/23°
Thursday sunny 10/23°
Friday thunderstorms possible 12/24°
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