Notodden Church is a modern building consecrated in 1938. It has been decorated by Henrik Sørensen and Stinius Fredriksen. A sculpture, "Devotion" by Anne Grimdalen from Tokke, stands outside the church.

Ramsåsen Nature Reserve in Elfterdalen is a large protected area of virgin forest. It is located at Lisleherad, about nine kilometers from Notodden.

The Heddal District Museum lies on a hill overlooking the Stave Church. There is a fine collection of buildings from the district including three cottages, a cotter's farm, a summer mountain farm and storehouses. Ramberg Cottage from Tinnegrend has an especially fine rosemaled guest chamber decorated by Ola Hansson in 1794. The guest cottage from Uppigard Høve built in 1744 is also exceptional.

Heddal Stave Church, five kilometers west of town, is the largest of the stave churches still standing in Norway and the most impressive. The present chancel is the oldest part and is thought to have been built in 1147. The rest of the church is from 1242. It is built in the form of a basilica, with 12 larger and 6 smaller interior columns. There is a gallery around the entire building. The church has 4 richly carved portals. The interior is decorated with old wall paintings and with rosemaling from rosemaling from the 1600's. Much of the furniture and fixtures have been removed to the Historical Museum in Oslo. However, the old "Bishop's Chair" still stands in the chancel. It is said to have come from the pre-Christian era. In 1952 an extensive restoration, financed by H. B. Holta of Notodden, was completed.