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.
At Hereiane on warm summer days one you can walk barefoot up the hill from the fjord all the way up to 400 metres elevation. The naked, furrowed bedrock often causes travellers who see it from the north side of the fjord to wonder. Why does it look like this, and why is there so little that grows here? It is a long way to the heavy metal industry in Ålvik and Odda, and there hasn’t been a forest fire in modern times.
Lake Skogseidvatnet is the most famous fishing lake in Hordaland, with good stocks of both char and trout. There is fishing here throughout the year: with a net in the autumn, through the ice in winter, and with a fishing rod in the summer.
Few other animal species on Hardangervidda have been as much the focus of scientific research as the spotted trout. The spotted trout is considered to be a genetic variant of brown trout. It lives in parts of the Krækkjav water system. Otherwise, on a world scale, this species is only found in a small area in Kaukasus, and possibly also in a lake in Rondane.