The iron and canal exhibition displays the history of the development of the Telemark canal, from prior to its inception all the way to the present day. The exhibition also displays the production of iron in the Ulefos Ironworks, the oldest ironworks in Norway which is still operating. See how iron was cast in the old days and read about the unique minerals and rocks in Fensfeltet. Group tours can be arranged by contacting tourist information. The exhibition is open during the summer holidays.