Close to the tunnel opening at Amalie Skrams vei in Ssandviken, there is a cultural monument of European dimensions; a rope making works that produced rope and fishing tackle for West and North Norway.
Yddal is one of the biggest and finest pine forest areas in the county. The rich forest resources provided an important foundation for the settlement of Yddal. Up until about the 1950s, there were three farms here. Where the lumberjacks couldn't get to, the trees grew very big and can be over 300 years old.
When the workers came to Kollsnes to start on the work with the landing for the gas terminal from the Troll field in the North Sea, they found the ruins of an old farm mill at Kvernapollen.