Photo: © B-Nature AS
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Osa Mountain & Tunnel Tour

Experience the extraordinary story of likely the largest industrial archaeological site in Norway. Journey through old tunnels and enjoy a break with homemade pancakes and marmelade!

This tour is an excursion with guide to the roughest part of Hardangervidda. You travel by bus through the spectacular Austdalen, with breathtaking views and waterfalls to Langevatn, a reservoir lake at alt. 1,200m, with a view to the large Hardangerjøkulen glacier.

The guide will tell you the fascinating history of 100 years of "energy" in Osa. On the way back down, we visit the stunning Røykafossen waterfall, before going to the historic 100 year old "Kafeen" for a pancake lunch.

After lunch the tour continues to the tunnels of Osa. A historical view on the epic plan to turn Osa into a city for 6,000 people, develop a railway and metal industry. A telling of the extraordinary story of Fossekompani who, in 1912, started the construction of a hydroelectric power plant.

In the roughest area of Hardangervidda, under harsh conditions, many kilometers of tunnels were constructed, including a vertical shaft of nearly 1 km inside the mountain.

After bankruptcy in 1923, the project was halted, and then resumed during WW II under German occupation, but abandoned again within 2 years. Ultimately, none of the many projects were completed.

Good to know

  • Meeting Place: B-Active Center, Tyssevikvegen 46, 5730 Ulvik
  • Duration: 3 hours, 30 minutes
  • Transport with mini-bus and helmet and torch during the tunnel excursion is included
  • Pancake lunch homemade marmelades, coffee/tea
  • This tour is intended for all age groups, no special requirements are expected
  • Children from the age of 5 may participate, if accompanied by parents

Welcome to a fun and thrilling experience in Hardanger! 

  • Fitness

    Fitness Level

  • Season


    01.JUN - 31.AUG

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