The Telemark-gallery hosts exhibitions with national and international art.

The industrial museum shows the most important Norwegian invention; The electric Arch and the end product artificial fertilizer. The fertilizer was crucial to change the lack of food in the world, and hugely enriched Norway.
The Art museum shows art from Norsk Hydro’s art collection. The collection contains paintings from the building of the electrical power plants and the golden era of Telemark, painted by Theodor Kittelsen and Christian Skredsvig.