Join us on a journey into the world of hydropower electricity production. At the easternmost edge of the Bernese Oberland, deep in the Haslital, electricity is generated for approximately one million households. On our guided tours, you will visit the underground facilities of the Kraftwerke Oberhasli AG (KWO) and gain valuable insights into the interplay of nature and technology. Plan your next adventure in the Grimsel world and experience the power of hydropower like never before.
Tours take place in German. English may be available on request.
Innertkirchen:
Experience Hydropower
Bookable all year around (Mo-Su)
Electricity production is most impressive at the foot of the Grimsel world. Here, in the underground Innertkirchen 1 power station, the mighty masses of water from the Grimsel gather and are converted into electrical energy.
Adults CHF 19.–
Children 6–15 years CHF 12.–
Free of charge for swiss school classes
Duration 1 h 30 min
Suitable for groups and schools between 10 and 25 people.
Winter Tour:
Hydropower Pioneers
20 October 2025– 23 April 2026 (Mo-Fr)
Transport from Innertkirchen, tour through Handeck 1, 2 and 2A power plants, and visit of the crystal exhibition. Followed by a tasty lunch (soup, sausage and bread).
Adults CHF 49.–
Children 6–15 years CHF 45.–
Duration 3 h
Suitable for groups of up to 20 people.
Winter Tour:
Grimsel Undergrund
Transport from Innertkirchen with Guided Tour of the Grimsel 2 Power Plant and the crystal grotto at the Gerstenegg.
Adults CHF 75.–
Children 6–15 Jahre CHF 65.–
Duration 4 h
Suitable for individuals, schools and groups of up to 15 people.
Innertkirchen:
Experience Hydropower
Bookable all year around (Mo-Su)
Electricity production is most impressive at the foot of the Grimsel world. Here, in the underground Innertkirchen 1 power station, the mighty masses of water from the Grimsel gather and are converted into electrical energy.
Adults CHF 19.–
Children 6–15 years CHF 12.–
Free of charge for swiss school classes
Duration 1 h 30 min
Suitable for groups and schools between 10 and 25 people.
Handeck:
Hydropower Pioneers
24 April – 25 October 2026
Tour through Handeck 1, 2 and 2A power plants, and visit to the crystal exhibition.
Adults CHF 29.–
Children 6–15 years CHF 19.–
For swiss school classes CHF 200.–
Duration 1 h 30 min
Suitable for individuals, schools and groups of up to 20 people.
Day experience: Power station, gorge and waterfall
9 May – 4 October 2026
The water of the Grimsel region is turbined one last time at the impressive Innertkirchen 1 power station. You then walk along the river and through the Aare Gorge before enjoying a trip to the legendary Reichenbach falls.
Adults CHF 44.-
Children 6-15 years CHF 28.-
Duration 7 h
Suitable for groups and schools between 10 and 25 people.
Grimsel Hospiz:
Grimsel Underground
Return trip with the Hospizbahn and a tour trough Grimsel 2 power plant and to the crystal grotto.
Adults CHF 42.–
Children 6–15 years CHF 29.–
Duration 2 h
Suitable for individuals and groups of up to 15 people.
Grimsel Hospiz:
Spitallamm dams
6 June – 25 October 2026
Guided tour of the old and new dam walls with impressive perspectives and lots of interesting information about the construction and water utilisation of Lake Grimsel.
Adults CHF 25.–
Children 6–15 years CHF 18.–
Duration 1 h 30 min
Suitable for individuals and groups of up to 15 people.
Day trip:
Grimselstrom
26 June – 4 October 2026
Day trip to the Kessiturm water castle, the Spitallamm dams, and deep underground to the Grimsel 2 pumped-storage power plant – including a visit to the world’s only crystal cavern at Gerstenegg.
Price per person: CHF 110.–
Duration: 6 h 30 min
Suitable for small groups of up to 15 people.
Day trip:
Oberaar power
26 June – 4 October 2026
Daytrip to Lake Oberaar with a visit of the concrete dam and the power station Grimsel 2. Inclusive lunch at the Berghaus Oberaar.
CHF 110.– per person
Duration 7 h 15 min
Suitable for groups of up to 15 people.
Map of the power plants
Grimselhotels
Do you also want to arrange drinks, lunch or dinner to accompany your tour? How about staying overnight in the Grimselwelt afterwards? Please contact the Grimselhotels directly.
Languages
Tours take place in German. English may be available on request.