Downstream the Rjukanfossen there is an unknown waterfall of about 25 meters, the Kvennhusfossen.
The Kvennhusfossen can be found near road 37, eight kilometers west of the town Rjukan (Tinn) . From road 37 there is a sideway, just after the tunnel, where you should have a good view on the waterfall.
There aren’t so many powerful waterfalls with a significant free fall in Telemark. The Rjukanfossen is a really beautiful waterfall in the river Måne and with a free fall of around 100 meters it is also the highest waterfall in Telemark. Only reservation I make is that there is a power plant which can reduce the waterflow.