Telemarkskanalen
Telemarkskanalen was hewn out of the rocks by hand, and stretches 105 km from Skien to Dalen in west and to Notodden in east. The Canal consists og eight locks with a total of 18 lock chambers, and a difference in height of 72 metres. The first part was completed in 1861 Norsjø -Skien and the Bandak Canal in 1892.