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![The spotted trout](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/eid_21.jpg?itok=LeOeyWy1)
Krækkjavassdraget
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.
![The delta at the outflow of Storelvi in Granvinsvatnet.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/gra_1.jpg?itok=er1kEGup)
Granvinsvassdraget
After the ice age, Granvin Fjord reached all the way up under Skjervsfjossen waterfall. Just a thousand years later, as a result of the rising of the land after the ice melted, this whole inner part of the fjord freed itself of the sea and became Granvinsvatnet lake. In spite of this rise in elevation, this waterway is still navigable for fish: Sea trout have wandered into Granvinsvatnet in more recent times and evolved to become freshwater trout. And salmon and sea trout made the journey 13 kilometres up the Storelvi river.
![Scythes used to be made in the brick house just across the motorway through Folkedal](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/kvh_367-3.jpg?itok=Q7DufBD1)
Nedre Folkedal
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.
![Lonelva](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/ost_10.jpg?itok=Zq5z_a93)
Lonelva
It is said that the salmon populations with the largest and the smallest salmon in the world both come from the waters that run out into the fjord system around Osterøy. Vosso is supposed to have the largest spawning salmon to be found in any river, whereas Lonelva is said to have the smallest.
![The Ostra chests are easily recognisable with their characteristic style.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/kvh_327-1.jpg?itok=x-fr2TBj)
Mjøsvågen
Around Mjøsvågen here is still a compact marine use area. Some of the buildings are common boathouses, but most of them also house small enterprises and workshops. This is where the farmers from Øvsthus, Mjøs, Hole and other farms have supplemented their meagre incomes as smiths, brass moulders, clog makers, chest builders and decorative painters.
![“The Karla Tannery”, Valestrand](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/1/kvh_324-1.jpg?itok=sLMcAPbz)
Valestrandsfossen- tanning industry
Valestrand became a centre for the tanning industry in Osterøy; one of the old crafts that has developed into a local industry with many places of work. From the 1870s ever more ventures were started. Many of the large sea houses we see today around the bay have been places for tanning and leather enterprises.
![Eio](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/eid_24.jpg?itok=YXGcEwC6)