Tinnsjå , also called Tinnsjø and Tinnsjøen, is one of the largest lakes in Norway, and one of the deepest in Europe. It is located between the municipalities of Tinn and Notodden in Vestfold og Telemark county. At its source in the west, the Måna river flows out of Møsvatn and past Rjukan into Tinnsjå. From the north, the river Mår flows from the Mår, Gøystavatn, and Kalhovdfjorden lakes into Tinnsjå. Tinnsjå is part of the Skiensvassdrag, and drains via the Tinnelva river in the south, down to Heddalsvatn.
In 1944, during the German occupation of Norway, the ferry SF Hydro was sunk in Tinnsjå by the Norwegian resistance. The Germans were using the ferry to transport a large quantity of heavy water to Germany, where it was to be used for nuclear weapon research. The heavy water had been produced at Vemork, a factory located in Rjukan.
Source: Wikipedia.org
Copyright: Creative Commons 3.0
Select one of the most popular activities below or refine your search.
Discover the most beautiful and popular trails in the area, carefully bundled into appropriate selections.
Source: Grzegorz Wysocki
Copyright: Creative Commons CC BY 3.0
Select one of the most popular categories below or be inspired by our selections.
Discover the most beautiful and popular attractions in the area, carefully bundled in appropriate selections.
Source: Grzegorz Wysocki
Copyright: Creative Commons CC BY 3.0
With RouteYou, it's easy to create your own customised maps. Simply plot your route, add waypoints or nodes, add places of interest and places to eat and drink, and then easily share it with your family and friends.
Route planner
<iframe src="https://plugin.routeyou.com/poiviewer/free/?language=en&params.poi.id=5807584" width="100%" height="600" frameborder="0" allowfullscreen></iframe>
More than 10,100,000 routes
More than 15,000,000 users
More than 4,500,000 points of interest
Kerkstraat 108
9050 Gentbrugge, Belgium
© 2006-2026 RouteYou - www.routeyou.com
| | Public | 
