Nice hike to the keeper 's house in the mountain side behind the Norwegian Museum of Hydropower and Industry (NVIM). Here you can see the distribution pool, the dry-made tunnels and the start of the pipeline that goes down to NVIM. Possibility of guided tours of the facility with a guide. But also very nice to walk on your own.
Drive to Tyssedal. Turn left towards Skjeggedal, follow sign to Trolltunga. Drive past the football field and sports facility Tyssohallen. You see a small parking lot in the steep curve a bit further up. Free parking. Follow the sign for Lilletopp.