Several older houses and farms from the former county of Telemark have been moved from their original location and rebuilt on site in the park.

[2][3] Søndre Brekke Manor is the principal attraction, with the main building from the 18th century located within the park.

The building received its final form from the owner cabinet minister, Nils Aall (1769–1854).

It has since developed into a large open-air museum with buildings from the Middle Ages until the 19th century, some with rose-painted interiors.

[4] [5] The indoor museum has a special permanent collection of folk art from all over Telemark.

Recently, the museum hosted an exhibit on the life of Vidkun Quisling, generating a lot of publicity.

[6] Henrik Ibsen Museum is on the site of the Venstøp farm in Gjerpen, 5 km from the center of Skien.

These were stored around town until Henriette Homan (1866–1943) by testament bestowed her farm Berg to the museum.