Fjøsanger is known among ice age researchers from around the world. Under an excavation in 1975-77, geologists from the University of Bergen found layers from the last interglacial, ca. 115 000 to 130 000 years old.
When high school student Arne Handegard collected plants for a herbarium in 1962, he didn’t know what kind of rarity he had pressed into his notebook. 30 years later he attended a botanical lecture, where a picture was shown of a plant he recognized: “Norwegian Sagebrush, which in Norway is only found in a large area of Dovre and in Trollheimen, and in a little area in Ry county”. Arne Handegard raised his hand: “That plant grows on Mt. Jonstein in Jondal”.
For many years the Folkedal scythe had a good reputation. Immediately above the highway through Folkedal there is a long brick building, on the inner side of the river. Here production of scythes went on to the beginning of the 1950s.
At the bottom of the Osa fjord there is a cultural landscape marked by great contrasts; the wide terraces and the river delta at the fjord contrast with the steep hillsides in the background, where Norddalen leads up to the mountain. There are two farms here. Osa and Sævartveit – the farm at the river mouth and the hollow by the sea.