All in all there are ten known copper mines and two iron mines on the Ølve peninsula. Geologically, the nine mines on Varaldsøy Island also should be figured in. The industry began at Lilledal in 1642 wth the mining of iron ore. From Jernsmauget by Dyråsen, the iron ore was sent to the iron works in eastern Norway.
Alvøen is one of the oldest industrial places in Norway. As early as the 1620s a gunpowder mill was built here. The place itself was well situated for industrial activity, lying only 100 m from the waterfall, which provided power for the mill, and a good harbour wherefrom the products were shipped. The success of the gun-powder mill varied in the 1600s and 1700s, but what made Alvøen best known was its paper production.
As a fairytale castle Damsgård Hovedgård lies on the slope rising up from the Puddefjord. The old connection between the farm and the sea, as we see it on Dreier’s prospectus from 1810, has been broken up by roads and encroachments in the building mass. But the main building itself is a central monument in Norwegian architecture from the 1700s – one of the finest representatives for the rococo period, with a magnificent and rich décor both in its interior and exterior.
Garden Stend høyrde i mellomalderen til Nonneseter kloster. Etter reformasjonen var han i eiga til Vincents Lunge fram til 1680. Då overtok generaltollforvaltar Hans Christophersøn Hiorth eigedommen. Hiorth vart adla i 1682, og Stend fekk status som adeleg setegard. Truleg fekk den staselege hovudbygningen si form i Hiorths embetstid.