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.
The post house at Øpstad stands out in the landscape. An ochre yellow house with a loft and a white-painted house in Swiss style with ochre edgings, bears witness to a well preserved house from the 1800s, nearest neighbour to the beautiful old vicarage. In the Øpstad hamlet there was a post office for more than a hundred years, until the 1970s. Today it is possible to walk the old post road across the mountain to Strandvik, as part of “Den Stavangerske Postvei” (The post road to Stavanger).
Whoever wanders the mountain plateau will form time to time hit upon old mountain summer farms, with solid old stone sheds, half sunk into the ground; a building tradition that has roots into prehistoric times. When we have been satiated with untouched Nature, it is somewhat comforting to come upon the old mountain chalets - they represent a type of human encroachment that we not only accept, but appreciate. They arouse a feeling of recognition and are a distinct witness to how people in the rural communities have made use of even the most remote resources.